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Monday, 27 March 2017

CROP DIVERSIFICATION IN THAILAND - Chavalvut Chainuvati* and Withaya Athipanan**

Deputy Director-General, Department of Agricultural Extension, Ministry of Agriculture and Cooperatives, Bangkok, Thailand.** Senior Subject Matter Specialist, Farm Management Group, Agri-business Promotion Division, Department of Agricultural Extension, Ministry of Agriculture and Cooperatives, Bangkok, Thailand.
1. INTRODUCTION
Thailand is located in the Indochina Peninsula with a total area of about 51.36 million hectares. Her territorial boundaries connect with Malaysia in the south, Cambodia in the northeast to east, Laos in the northeast, and Myanmar in the northwest to west.

Geographically, the country may be divided into four regions. In the central, northern, northeastern and southern regions, altitude modifies the temperature considerably. It is cool enough in the northern region to produce temperate fruits and vegetables (also vegetable seeds); cool and dry in northeast region, and modestly humid in the central region. These three regions have three seasons: rainy during late April to October, winter from November to February, and summer from March until April. In the southern region, there is no cool season and the climate is wet, but with less solar radiation than is needed for maximum crop yields. Thailand's climate is tropical and monsoonal, influenced by the southwest monsoon except for the south. Average annual rainfall and temperature vary, ranging from 998 - 4,603 mm of precipitation and a temperature regime of 24.4 - 29.3° C (76-85° F).

Administratively, Thailand is divided into 76 provinces, each headed by a governor. There are 787 districts and district branches, 7,404 sub-districts, and nearly 66,604 villages in the 76 provinces. The population in 1996 was over 60 million people, and of this population 64 percent reside in the rural areas. Approximately 90 percent of the rural people, or 5.2 million farm families, earn their income through subsistence farming, particularly rice cultivation and other field crop production.
In Thailand, 64 percent of the population are engaged in agriculture. Most of them grow single crops such as rice, cassava, corn, sugar cane etc. The proportion of income per capita of those engaged in agriculture to other sectors was 1:13 in 1997. Several development programmes have failed because there were no realistic assessments of the limited resource base of small farming systems.

The survival and social-economic pattern of the householders was not taken into full account. The basic assumption is that small-scale farmers in Thailand will be responsive to development efforts if the technology fits their needs, aspirations and environments.
The Department of Agricultural Extension (DOAE) has realized such drawbacks and put more efforts to solve these kinds of problems. The strategy is in line with the government's policy during the 7th and 8th National Economic and Social Development Plan (1992-1996 and 1997-2001) which attempted to restructure agricultural production systems by promoting diversified crops instead of a single crop; which took into account income distribution of farmers and natural resources conservation, including environmental issues.

Therefore, the main concept implied in farm diversification (crops, livestock and fisheries) and crop diversification programmes should be placed in a proper perspective in order to
- respond to the objectives and goals of the farmers such as consumption, household utilities, income etc;- increase farm income and provide a continuous income for farm families;
- reduce farmers' risk and encourage them to make their own farm plans;
- promote various farm enterprises to avoid any risk and uncertainties from natural disasters and marketing setbacks;
- encourage the farmers to recycle farm wastes and integrate farm activities such as crops, livestock and fisheries;
- minimize the use of external inputs; and
- conserve the natural resources and balance the agro-ecosystems at the farm level.
2. AGRICULTURE SITUATION IN THAILAND
About 41.5 percent (21.28 million hectares) of the total area are farm holdings, with some 17.5 percent of this presently under irrigation. This land, both irrigated and non-irrigated, is used by some 5.2 million farm families to produce agricultural goods for domestic consumption and export.
Among the large number of crops of economic significance, rice is the most important which is widely grown in all regions and covers about half of the country's cultivated area. Other major field crops are cassava, corn, sugar cane, oil crops and perennial trees such as para rubber, fruit trees cover the rest of the area. The utilization of farm land is as follows: 51 percent for paddy, 24 percent under field crops, 17 percent under fruit trees and other tree crops and others occupy 8 percent. The major planted areas of selected crops are rice, maize, cassava and rubber. The planted area, yield, production and value of economic crops in 1997/1998 are shown in Table 1.
Table 1. Planted Area, Yield, Production and Value of Economic Crops
Crops
Area (1,000 ha.)
Yield (ton/ha.)
Production (1,000 tonnes)
Value (Million of US$)
Major rice
9,113.28
2.14
18,789
3,275.39
Second rice
1,156.96
4.23
4,791
825.37
Maize
1,396.64
3.20
3,832
421.52
Cassava
1,071.04
14.93
15,591
491.12
Sugar cane
943.52
49.68
46,873
594.12
Para Rubber
1,831.04
1.42
2,169
1,262.90

The National Economic and Social Development Plan also places emphasis on the commercialization of agriculture, moving away from subsistence farming towards intensive monocrop production for export. However, the proportion of the agricultural gross domestic product (GDP) declined to 25 percent in the 3rd plan and less than 15 percent in the 7thplan, respectively as shown in Table 2. The Table 3 indicates the GDP in agricultural sector from the 3rd - 7th plan which includes crops, livestock and fisheries, sharing about 60 percent, 8 - 10 percent and 9 - 11 percent of GDP in the agriculture sector, respectively.
Table 2. Gross Domestic Product Value during the 3rd - 7th National Development Plan
Unit: percentage
Sector
3rd Plan
1972-1976
4th Plan
1977-1981
5th Plan
1982-1986
6th Plan
1987-1991
7th Plan
1992-1996
1. Agriculture
25.08
21.39
19.01
14.88
10.30
2. Non-Agriculture
74.92
78.61
80.99
85.12
89.70
Source: National Economic and Social Development Board (NESDB), 1997
Table 3. Gross Domestic Product Value in Agricultural Sector
Unit: percentage
Sector
3rd Plan
1972-1976
4th Plan
1977-1981
5th Plan
1982-1986
6th Plan
1987-1991
7th Plan
1992-1996
Agriculture
100
100
100
100
100
- Crop
60.8
60.7
63.2
61.9
61.3
- Livestock
8.8
9.9
9.5
10.6
10.7
- Fishery
9.8
9.7
9.7
10.7
11.7
- Forestry
10.4
7.7
5.3
3.2
0.6
- Simple Agriculture Processing Product and Agriculture Services
10.2
12
12.3
13.6
15.7
Source: National Economic and Social Development Board (NESDB), 1997
The situation of import and export of crop products in 1997 showed that the principal agricultural products exported included rice, para rubber, cassava products, fruits and vegetables (fresh, frozen, processed and canned), non-glutinous and glutinous rice flour, canned pineapple, refined sugar etc. Principal agricultural products imported were paper and paper products, soybean products, raw cotton and lint, wheat, palm oil, vegetable seeds etc.
3. NEED FOR AGRICULTURAL DEVELOPMENT
During the past three decades, national development grew increasingly in various aspects, in particular, industries, services and agriculture. Natural resources were much utilized, both directly and indirectly, for production in each of the sectors. Agricultural inputs were brought into use, i.e., fertilizers and chemical pesticides. Impact of such development resulted in deforestation, soil fertility loss, drought, flooding and serious outbreaks of plant pests as well as pollution of soil, water and the atmosphere. Thai farmers, particularly rural poor and even average growers, could not produce as much as expected. They suffered accordingly from low production, low prices, but high cost of production.
Over the past few years, agricultural development policy placed emphasis on increasing production which mainly relied upon natural resources, the transfer of technology and the support of certain production inputs. Although such development can achieve the goal to increase farm production sufficient for domestic consumption, import substitution, exports, and raw materials for local processing industry, it was found that the producing farmers are the ones who have been burdened with the economic imbalances. An income gap between farmers and those engaged in other occupations is wider to the extent that farmers are considered as the poorest group.
The problems of farmers' income and the downward trend of the agricultural sector growth stems from major factors such as: shortage of water for agriculture, less and inconsistent rainfall distribution, deterioration of farm land, as well as competition in the world trading of agricultural commodities being dominated by protectionism on the part of several groups of nations. Taking this into account, the government and the Ministry of Agriculture and Cooperatives have set up the policy on restructuring of agricultural production systems with a view to maintain the growth rate of the agricultural sector and to raise farmers' incomes. The policy will be diverted from the promotion to increase production to place more emphasis on the increase of farmers' incomes and the alleviation of prevailing poverty problems. This can be done by providing the farmers with alternatives suitable for their area potential, their readiness and market opportunities so they will be able to make decisions on restructuring their own production systems while balancing the utilization of natural resources.
4. TYPICAL FARMING SYSTEMS
The typical cropping systems practiced in each region can be divided as follows:
a. North: Mountainous upland area where the cropping patterns are upland rice, field crops (cropping systems such as soybean-mungbean, corn-mungbean, mungbean-cotton, corn-sorghum etc.) and fruits such as lychee, longan, mango etc. The fruit tree-based cropping systems are mostly intercropped with field crops, vegetable crops and flowers. With only 10 percent of the lowland under irrigation, the cropping systems are wet season rice followed by dry season rice or soybean, mungbean, peanut, tobacco, sweet corn, baby corn, onion, garlic, tomato, water melon etc. The typical cropping systems in this region, therefore, are rice-based cropping systems and fruit tree-based cropping systems.b. Northeast: Rainfed rice is mainly grown once a year in the semi-arid plateau with sandy infertile soil. Dryland cash crops planted are cassava, jute and mulberry for sericulture. For the lowland under irrigation, wet season rice is grown followed by dry season rice or soybean, mungbean, peanut, jute, sesame and some vegetable crops. In addition, diversification has also been carried out in this region, especially with such fruit trees as mango, sweet tamarind, banana, papaya etc., as well as livestock and rice-fish culture in rainy season as alternative agriculture production enterprises. The typical cropping systems, therefore, are rice-based cropping systems and field crop-based cropping systems.
c. Central Plain: Two or three crops of rice area are grown annually in the most fertile region of the country with the largest irrigated area. Other major crops are fruit trees, vegetable crops, field crops and also livestock. The cropping systems under irrigation are wet season rice followed by dry season rice or soybean, mungbean, peanut, sweet potato, water melon, sesame, and some vegetable crops such as sweet corn, baby corn, yard long bean, pumpkin, cucumber etc. For uplands the cropping systems are corn-sorghum, sesame-mungbean, mungbean-corn etc. During the last few years, fruit-tree based cropping systems have been practiced in this region. Livestock and fisheries have also been integrated with crop enterprises. The typical cropping systems in this area, therefore, are rice-based cropping systems and field crop-based cropping systems.
d. South: The major crop is rubber. Rice, fruit trees, vegetables, other cash crops, marine fisheries and prawn farms are also important. For the lowland, the cropping systems are wet season rice followed by dry season rice or water melon, peanut, mungbean, sweet corn, taro etc. Rubber-based cropping systems, can be widely seen in upland area in the rainy season. Most of rubber plantations are intercropped with upland rice, sweet corn, peanut, pineapple, banana and other field crops. Fruit and other perennial trees such as coconut, rambutan, mangosteen, durian, longan, oil palm, coffee, cocao etc., are mixed and intercropped with the same crops as in rubber-based cropping systems.
Farmer's Decision Making towards Diversification
Whether alternative proposals by a government agency will be accepted or not is a question of the incentives provided and understood by the target farmers. In viewing the alternative proposals in economic terms, the farmers will consider whether the income generated by the alternatives is higher than the traditional one. As to the social aspects, an alternative plan may or may not be suitable for their farm resources in terms of land, labour and capital availability. That means market and farm resources are the main factors influencing the decision making (and risk taking) which are the farmers' own choice, and not the government's choice. The farmers will not accept the alternatives if they cannot see a market opportunity. The farmers will also consider whether the land, labour and capital they have are suitable for a diversification programme.
5. PROBLEMS/CONSTRAINTS IN AGRICULTURE
Problems in agriculture stem from technical, economic and social factors. Major problems can be summarized as follows:
Poverty of Farmers and Income Distribution
In general, farmers are poor because of their main engagement in agricultural production, which has to face difficult conditions such as natural disasters, uncertainties of markets and farm prices, as well as good quality produce to meet market demand. Farmers are regarded as the poorest group in the country.
Production Efficiency
Agricultural production efficiency in Thailand is relatively low because the production depends mainly on rainfall; farmers are therefore unable to integrate the adoption of technology for the increase of their crop productivity. Furthermore, most farmers are less educated, which is a constraint in laying down production plans in line with changing situations. Besides, there are problems with farming in unsuitable land. These factors result in the low production of various crops.
Land Tenure
More than half of the Thai farmers have farm holding sizes of less than 3.2 hectares per household. In the future, the farm land tenure is expected to gradually decrease because of limited land resources as well as the inability to compete with other production and services sectors to secure additional land. The small plots of land occupied by farmers are usually situated in non-irrigated areas; their income is therefore low which is insufficient for their subsistence.
Marketing and Farm Prices
In general, the quantity of supplies of farm products is unstable and low because most farmers are small producers. The quantity of their production is in small amounts. Farmers still lack the facilities to store their produce after harvesting for even short periods. The farm prices are determined by the marketing mechanism at different periods and farmers have no bargaining power for their produce.
Technology Transfer and Dissemination of Information for Decision Making
Another problem and constraint of farmers is their education, which is normally at the compulsory level only. However, the development of technology to increase the production efficiency and value of products is deemed necessary because the dependence on natural factors only does not enhance the competition in the world market. With the decrease of soil fertility, the major production inputs, technology and proper management has become essential. So, it is necessary that technology from elsewhere be modified and improved to suit local conditions before transferring to the farmers. However, the farmers' adoption of such technology requires updated and reliable information together with the readiness of capital for procurement of production inputs.
Environment differences and non-transferable technology becomes one of the major constraints. This is because research on crops, in the form of basic research, is carried out at the research station. Consequently, technology transfer is not appropriate or fitted to the farmers' circumstances because of different locality and environment variables.
Socio-economic constraints include cost and return for enterprise investment, supporting inputs attitudes and traditions. Besides that, information flows hardly ever reach the farmers.
Funds for rural credit are limited with the result that farmers have to borrow from money lenders, traders and middlemen in order to buy farm inputs and produce from the market. Borrowing money usually means paying interest rates as high as 10 percent per month.
6. POTENTIAL FACTORS
Land: The cultivated land is approximate 21.28 million hectares of which rice alone covers 10.88 million hectares or more than 50 percent of land used. During the past decade, rice cultivation has decreased therefore increased productivity from existing land and crop intensification by managing proper cropping systems and crop diversification are deemed necessary.
Labour Distribution: Farm labour is one of the limited farm resources. At present, labour mobilization is a very important problem for farm development since skilled labour in rural areas has migrated to the industrial areas. However, farm machinery is available, as is mechanization technology for use for substitution of farm family labour.
Capital: The Bank for Agriculture and Agricultural Cooperatives (BAAC) provides credit to the farmers as short term, intermediate term and long-term loans. Moreover, the commercial banks have a similar policy to support the farmers' loan scheme as BAAC. When farmers acquire money from money lenders, they have to pay interest higher than loans from the BAAC or the commercial banks. However, the farmers can accumulate their own capital by themselves or through union saving or revolving funds in the villages etc.
7. SUSTAINABLE AGRICULTURAL MANAGEMENT FOR SMALL FARMERS IN THAILAND
From past to present, a shortage of water supply for agricultural activities has been a major problem facing Thai farmers. The impact is severe for the agricultural areas, which rely heavily on rainwater. Unfortunately, such areas where there is little precipitation constitute a predominant part of the country with mostly rice and field crop farming being implemented. Such a condition limits farmers from carrying out their cultivation to only once a year during the rainy season. Moreover, farmers are exposed to high risks and damage due to adverse environmental conditions of soil, climate, and inconsistent rainfall patterns. Although efforts have been made to tackle water shortage problems, for example, by digging ponds to store water, appropriate sizes or systems have never been determined. There are still other factors which magnify the shortage of water such as unsystematically planned crop cultivation or mono-cropping farming systems.
Being aware of this situation, His Majesty King Bhumibol Adulyadej graciously set up an initiative to relieve the farmers from suffering and guide them through the plight of water scarcity, with minimal impacts and pain.
His Majesty' s ingenious solution was named the “New Theory”. It serves as a set of principles or guidelines on the proper management of land and water resources to create optimum benefits for farmers who own a small piece of land.
In the “New Theory: a Novelty in Agriculture”, His Majesty King Bhumibol Adulyadej gave guidelines to the people who live in rural areas (farmers) by Royal Proclamation:
“...New theory... a new way to help people make a living on subsistence level. They might not be that rich but they would not starve either.“...An integral part of this programme is the division of land into 3 parts, one for rice farming, another for gardening and the last portion for water storage...”
The New theory is a novel approach and concept aimed at assisting individual farmers possessing a small piece of land in being able to manage the utilization of land and water for agricultural activities properly in order to create optimum benefits. The implementation plan is divided into three phases as follows:
7.1 Phase 1: The allocation of Land for Farming Activities and Housing Area
The small piece of land is divided into four parts. Part 1, or about 30 percent is set aside for digging a pond to store water for cultivation as well as for raising aquatic animals and plants. Part 2, or about 30 percent will be used for rice farming which will provide the family with sufficient rice for consumption all year round. Part 3, or another 30 percent of the land is allocated for planting of fruit trees, vegetables, field crops, etc., from which farmers can sell the surplus to the market. The last 10 percent is reserved as a place for housing, animal raising, and other purposes. The ultimate goals of the theory are to ensure that during the dry season, a sufficient amount of water will be available for cultivation; farmers will have enough rice to eat all year round and become self-reliant at an economic level; and hopefully, unity will prevail within the community.
From “New Theory” phase 1, There are main principles and important guidelines, which can be described as follows:
a. The main idea of the “New Theory” is to serve as a production system that allows farmers to become self-sufficient, self-reliant, and frugal. To be viable, this concept requires unity and willingness of the community to work with and assist one another in order to reduce expenses, similar to the traditional practice of Long Khaek (traditional mutual help gathering for an activity such as rice harvests).
b. With rice being the staple food for every Thai household, the theory estimates that, if each family carries out rice cultivation over an area of 0.8 hectares they will be guaranteed a whole year's supply of rice for consumption. This means that farmers will not have to buy rice at an unreasonably high price and can lead their lives freely because they have become self-reliant.
c. Another important point is that the storage of water must be sufficient to supply farming during the dry season or dry spells. Therefore, the concept ensures that a part of the land is set aside for the construction of a pond to store sufficient water for all year round cultivation. According to His Majesty's guideline for cultivation of 0.16 hectare, a farmer will need about 1,000 cubic metres of water. Thus, under the “New Theory”, if an area of 0.8 hectares is used for rice farming and another 0.8 hectares for field or fruit crop farming (a total of 1.6 hectares), approximately 10,000 cubic meters of water will be needed annually.
Therefore, under the assumption that each piece of land has a total area of 2.4 hectares, a formula has been derived for farmers to apply on their plots as follows:
- an area of 0.8 ha for rice cultivation.- an area of 0.8 ha for field and garden crops cultivation.
- an area of 0.48 ha for a pond with a depth of 4 metres and a storage capacity of 19,000 cubic metres which is a sufficient amount to supply farming and other daily needs during the dry season.
- an area of 0.32 ha for housing and other activities.
In any case, a decision about the size of the pond should be made based on the local geographical and environmental conditions as follows:
- If the implementation plot is located in an area which depends on rainfall, then the pond should be dug quite deep in order to prevent evaporation, thus allowing all year round water supply.- If the implementation plot is located in an area which depends on an irrigation system, then features of the pond can be flexible, in terms of the depth, or width. Only the local suitability needs to be considered because with an irrigation system, a water replenishment source is secured.
The purpose of having a pond is simply to allow farmers an all year round water supply for their occupation and consumption usage. His Majesty referred to it as a 'regulator', implying that a well-defined water replenishing cycle system has been established to support farming all year round, particularly during the drought and dry spell periods. However, this does not mean that farmers can cultivate Na Prang rice (off-season rice farming). If the water in the pond is insufficient, it is then necessary to pump water from an existing nearby dam, thus depleting the amount of water that has been stored in the dam. It is recommended for farmers to cultivate rice during its regular season, which is in the rainy period. Meanwhile, during the dry season, farmers must consider other suitable types of crops to cultivate in order to use the stored water both efficiently and optimally.
- In the rainy season, water will be plentiful for rice and cultivation of other crops.- During drought or dry spell periods, it is most suitable to cultivate crops that do not require large amounts of water, such as beans.
d. For this scheme to divide the land in order to produce optimum benefits, His Majesty based his calculations on the fact that each farmer owns an average land area of 2.4 hectares. However, the following plan is not a fixed formula but simply a guideline in which farmers who own more or less of this amount of land can adjust the 30: 30: 30: 10 ratio.
In any case, the described ratio only serves as a recommended formula or as a guideline. Adjustments of the ratio can and should be made to suit each area's location characteristics such as the soil type, the amount of rainfall, and the environment. For instance, in the southern region where rainfall is more plentiful or in areas where sources of water are available to continuously replenish the pond, it will be possible to reduce the size of the pond and allocate the surplus land.
Recommended Types of Crops and Animals for Farming
Crops
Fruit trees and Other Perennial Plants: mango, coconut, tamarind, jackfruit, sapodilla, orange, banana, custard apple, papaya, santol, sesbania, horseradish, neem tree, cassod tree, lead tree, etc.
Short-lived Vegetables and Flowers: sweet potato, taro, yard long bean, eggplant, jasmine, aztec, globe amaranth, rose, Calotropis, tuberose, etc.
Mushrooms: nang-fah mushroom (Pleurotus sajor-caju), straw mushroom, abalone mushroom (Pleurotus cystidiosus), etc.
Herbs and Spices: areca palm, betel pepper, pepper, elephant yam, Centella asiatica, ebony tree, ringworm bush, vetiver grass, as well as certain types of crops such as holy basil, common basil, mint, basilicum, lemongrass, etc.
Wood and Firewood: bamboo, coconut, palm, camachile, combretum, coral tree, siris, lead tree, eucalyptus, neem tree, cassod tree, Pterocarpus, Dalbergia, Dipterocarpus alatus, etc.
Field Crops: maize, soybean, groundnut, cowpea, pigeon pea, sugar cane, cassava, castor, kapok, etc. Some types of field crops could be harvested when they are still young and sold in the market because they can get better prices than when they are ripe. Such types of crop are maize, soybean, groundnut, cowpea, pigeon pea, sugar cane, cassava, etc.
Soil nourishing and ground cover crops: pigeon pea, Caribbean stylo, African sesbania, sesbania, sunhemp, sword bean, cassod tree, lead tree, green pea, etc. After they have been harvested, the soil can be ploughed and turned over to further nurture the soil.
It must be noted that many plants provide more than one benefit. Emphasis in plant selection should be placed on perennial plants because they do not need intensive care once they are fully grown; while their products are obtained all year round if different types of plants have been selected. These perennial trees will provide shade and moisture to the living area and the environment. Not only that, it is necessary to consider the area's natural characteristics. For instance, eucalyptus should not be planted around the edges of the pond, instead, trees that yield fruits would be more suitable.
Animals
Aquatic animals such as common carp, nile tillapia, common silver barb, and catfish will provide protein supplements and can also be sold to earn additional income. In some areas, frogs can also be bred.
Pigs or chickens are raised along the edges of the pond. In this case, pig and chicken dung may be used for fish and duck feed.
Once farmers understand the principles and apply the preliminary steps described in Phase 1 successfully, they can then proceed to improve their living status in becoming self-sufficient; to cut down most of the expenses; and to be free from the external constraints. In order to accomplish greater productivity, it is necessary to follow the steps in Phase 2 and 3, respectively.
7.2 Phase 2: United Force of the Community
Once farmers have grasped the overall concept and successfully implemented Phase 1, which produced satisfactory outcome, it is time to begin Phase 2. The second phase suggests that farmers pool their efforts, resources, and form themselves into groups or cooperatives to execute the following activities:
a. Production (crop selection, soil preparation, irrigation system, etc.)
In this aspect, farmers have to work together in the production activities, which include water for storage, pond preparation, crop varieties selection, fertilizers, and other required inputs.
b. Marketing (sun-dry area, silo, rice mill, product distribution, etc.)
Once they have produced the product, the next step is for farmers to make the necessary preparations in order to optimize marketing prices of their produce. These activities include provision of a central rice-drying area, a silo to gather the rice crop, and a rice mill as well as grouping to sell their produce at a satisfactory price, which, in the process, also reduces their expenses.
c. Well-being (food, clothing, etc.)
Farmers also need to have a decent living standard, which equips them with the basic needs of life such as food and clothing.
d. Welfare (public health services, loans, etc.)
Each community should offer security and needed services such as a public health station or funds established to provide loans to carry out the community's activities.
e. Education (school, scholarships, etc.)
The community should play a dominant role in promoting the pursuit of education, for example by establishing a fund to support the education for youth.
f. Society and Religion
The community will serve as a tool for social and moral development with religion as a welding component.
All the above-mentioned activities require complete cooperation from everyone concerned, be it the government agencies or the private sector, and equally important, members of that community.
7.3 Phase 3: Joint Efforts between Groups or Cooperatives and Organizations or the Private Sector
After Phase 2, individual farmers or groups of farmers would then proceed to Phase 3, which involves making the necessary contacts and coordination to establish a fund or ensure funding from credit sources such as banks or companies, in order to assist them in the investment for activities that improve the quality of their life.
Under such arrangements, both farmers and the credit sources will receive mutual benefits as follows:
- Farmers can sell their rice at a higher price (without being suppressed in terms of the price they want in exchange for the products).- Credit sources can buy rice at a lower price (since they buy directly from farmers and mill the paddy by themselves).
- Farmers can obtain consumer goods at a low price because they can buy in bulk (by operating like a cooperative store and having the privilege of buying commodities at a wholesale price).
- Credit sources can dispatch their personnel to various locations to implement different activities, which guarantee better results.
8. GOVERNMENT'S POLICIES AND STRATEGIES FOR CROP DIVERSIFICATION
The achievement of agricultural development over the past resulted from the country's existing natural factors which made it more advantageous than other nations, i.e. favourable climatic conditions, vast and fertile planted areas, oversupply and cheap agricultural labour costs. All these factors contribute to low production costs although the yields per unit area are not particularly high. However, as far as the world market is concerned, Thailand faces stiff competition from the agricultural sector of many countries of the world.
In the past, plans and directions for agricultural development were laid down in line with the economic changes and the national development guidelines as follows:
During the period of the First and Second National Economic and Social Development Plans, emphasis was placed on the improvement of the country's basic infrastructure. This included the construction of large-scale dams for irrigation and electricity, roads, the support for research, agricultural promotion and experimentation. Although these plans helped to develop infrastructure in farming communities, they did not trigger any dramatic improvement in the farmers' production levels.
The Third and Fourth Plans gave emphasis on speeding up agricultural production, quality improvement of export products, and production diversification. The latter was aimed at widening the range of commodities, that is rather than dwelling only on the major traditional crops like rice, maize, cassava, and para rubber. During this period, there was a great number of forest encroachments and expanding farm land. Hence, the importance of providing land ownership was taken into account by the promotion of land reform programmes. Still, this development did little to change the income distribution structure. It was envisaged that income derived from the agricultural sector was much lower than that of other sectors.
During the Fifth Plan period, importance was given to the increase in production efficiency rather than expansion of planted areas. Attention was also paid to income distribution, expansion of prosperity to rural areas, and alleviation of rural poverty problems. But the national development during this plan caused a remarkable disparity of income between agricultural and non-agricultural sectors. With regard to the Sixth Plan, its development guidelines had been continued from the previous plan, focusing on restructuring of agricultural production, increasing production efficiency, promoting the application and transfer of technologies appropriated to each area, encouraging the private sector's involvement in agricultural development, improving the utilization and conservation of natural resources, as well as improving the administrative system of agricultural development.
The last three development plans of the Department of Agricultural Extension (DOAE) in 1982-1996 have focused on high output agriculture, resulting in a degradation and misuse of natural resources and causing serious pest, disease, soil and water problems, as well as problems to farmers' health. This has led to production problems, especially for the rural poor who have little or no access to credit and land rights.
The main objectives of agricultural extension development plan of DOAE during the 7th National and Economic Social Development Plan (1992-1996), were to:
- maintain and stabilize the agricultural sector growth rate and commodity prices.
- generate even income distribution and raise farmers' income.
The objectives are to be met through the following policies:
- restructuring agricultural production systems.- stabilize farm prices and farmers' incomes.
- development of farmers' institutions, improving the quality of life of farmers and maintenance of the environment.
- development of the agricultural extension administrative system.
The promotion of crop diversification is a main component of these policies, aiming at improving small farmers' incomes and their standard of living through producing a low risk farming system, with a low capital input, which at the same time conserves natural resources and causes no harm to the farmers' health.
9. AGRICULTURAL EXTENSION POLICY AND MEASURES (FISCAL YEAR 2000)
The country's economic and financial crisis has had a detrimental effect on the reduction of annual budget expenditures, resulting in critical unemployment in industrial, commercial and services sectors. Meanwhile, the crisis also affected the increase in agricultural production costs since farm inputs such as chemical fertilizers, pesticides and other agricultural chemicals, pharmaceutical products and fuel have to be imported from foreign countries.
The agricultural sector has played a dominant role in food production; provision of raw materials for downstream industries; creation of job opportunities in rural areas to absorb the labour force; and foreign exchange earnings derived from the export of agricultural products. As a result, in this current crisis state, it is anticipated that the agricultural sector can help alleviate and rapidly revive the national economic situation to normal levels.
In order to maintain the growth rate in the agricultural sector, to increase the capability in export competitiveness of agricultural products to foreign markets, to accelerate domestic production for import substitution, to create jobs in rural areas to absorb unemployed workers and to prepare for global climate change, the Ministry of Agriculture and Cooperatives (MOAC) has adjusted its action plan for implementation in the last period of the 8th National Economic and Social Development Plan to include the following: 1) restructuring of the agricultural sector; 2) increasing in production efficiency and reduction of production costs; 3) improvement of products quality and processing; 4) restructuring of the MOAC; 5) promotion of rural savings; 6) management of chemical fertilizers and other agricultural chemicals; 7) management of forest, soil, water, coastal areas, and biological resources; 8) preparation for global climate change; and 9) preparation for the 21st Century.
With regard to the adjustment of the MOAC's roles and functions, the Department of Agricultural Extension (DOAE) has therefore been tasked to be a core agency to transfer agricultural technology (crop, animal raising, and fisheries) and to provide agricultural information services to farmers on a basis of one-stop service. By this means, farmers can bring the gained knowledge, experiences and skills to engage in their farming occupation to the extent that they can be self-reliant and can increase production efficiency at community level. This results in farmers' income generating, the improvement of the quality of life, the development of capability of local communities in making their own decisions, analyzing problems, participating in production, processing and marketing processes as well as managing national resources and environment which will lead to sustainable agricultural development.
Measures to Support Farmers to be Self-reliant
· Encourage local organizations and farmers to be able to analyze and draw up their own farm production plan at community level with the technical and information support from the extension agents.
· Assist small farmers and those who stay in the state's allocated land to produce food for household consumption by adopting integrated farming, the “New Theory” of agricultural development and other alternative agriculture so as to reduce marketing risks and high cost of production arising from imported production inputs.
· Encourage farmers' institutions or local communities to lessen the dependence upon external funds and promote rural savings as internal funds, instead. This fund will be used for improvement of production efficiency, support of processing and agro-industries or downstream agro-industries towards the production of value-added products. In addition, another fund will be set up to assist farmers and farmers' institutions in marketing aspects.
· Support farmers' institutions and local organizations to provide services in acquiring planting materials, breeding animals, and production inputs which are of good quality and of fair prices to farmers.
· Promote agricultural processing at household level to increase value of the products and develop a wide variety of product types to meet market demand.
· Support the establishment of local markets as places for purchasing and selling agricultural products in each locality.
· Enhance the setting-up of agricultural product storage at local level and accelerate the utilization of the existing ones so that the products can be gradually supplied to the markets according to the periodic demand.
· Promote backyard vegetable and native vegetable production sufficient for household and local consumption.
10. CONCLUSIONS AND RECOMMENDATIONS
It is envisaged that the production structure in the agricultural sector as well as in farm households has changed in line with the changing economic situation. Moreover, during the past few years problems such as water shortage for agriculture and low price for rice were prevailing. Therefore, the government's policy emphasized restructuring the agriculture production system in line with availability of natural resources, market demand and readiness of farmers by a) introducing other promising crops in substitution for the second rice crop and b) replacing rice with more remunerative commodities in areas unsuitable for rice cultivation.
The following are some general recommendations:
· The Ministry of Agriculture and Cooperatives (MOAC) must support and strengthen coordination among government officers in terms of budgetary and technical matters, as well as work benefits. Further, they should coordinate their work in adjusting land models for production systems within diversified cropping systems.· The Government and/or financial institutions must set up available funds, so that long-term agricultural credit can be provided to build up diversified cropping systems with low interest rates for farmers, in line with their production plan. This will help generate quick returns from their activities.
· The Government must assist landless farmers in acquiring land in special areas in order for these farmers to make a living in agriculture. Furthermore, assistance must be given regarding models of production and related production inputs. The production models should be geared towards crop diversification.
· Local communities and farmer organizations should be assisted in production techniques, management, buying and selling of agricultural inputs and produce as well as in contract farming, so these organizations can function as centres for production and marketing services.
However, crop diversification programmes need a lot of investment. The major policies are: to have available credit systems, manage land reform and infrastructure development, and disseminate agricultural technologies and marketing information to farmers.
REFERENCES
Athipanan, Withaya. 1995. Farm Diversification in Thailand. Paper presented to Asian Productivity Organization, Seminar on Development of Sustainable Farming system at Kandy, Sri Lanka, 5-10 June, 1995.
DOAE, DOA and OAE (Department of Agricultural Extension, Department of Agriculture and Office Agricultural Economic). 1987. Cropping System: Crop Diversification Project. Department of Agricultural Extension, Department of Agriculture and Office Agricultural Economics, Bangkok, Thailand (in Thai).
DOAE (Department of Agricultural Extension). 1993. Policy, Strategy, Measure of Agricultural Extension. Department of Agricultural Extension, Bangkok, Thailand.
DOAE (Department of Agricultural Extension). 1998. Diversified and Integrated Farming Systems Project. Agricultural Business Promotion Division, Department of Agricultural Extension, Bangkok, Thailand (in Thai).
DOAE (Department of Agricultural Extension). 1999. Agricultural Extension Policy and Measures Fiscal Year 2000. Department of Agricultural Extension, Ministry of Agriculture and Cooperatives, Bangkok, Thailand.
KUMOAC and IDRC (Kasetsart University, Ministry of Agriculture and Cooperatives and International Development Research Centre). 1977. Annual Report Cropping Systems (Thailand) Project. Kasetsart University, Ministry of Agriculture and Cooperatives and International Development Research Centre, Bangkok, Thailand.
Keowan, Bumpen. 1998. Agricultural Management in Thailand. Paper presented to Modern Agricultural Management. International Class at Hubei, People's Republic of China, May, 1998.
MOAC (Ministry of Agriculture and Cooperatives). 1992. The Seventh National Economic and Social Development Plan (1992-1996) in Work Plan of Ministry of Agriculture and Cooperatives. Bangkok, Thailand (in Thai).
MOAC (Ministry of Agriculture and Cooperatives). 1997. The Eighth National Economic and Social Development Plan (1997-2001) in Work Plan of Ministry of Agriculture and Cooperatives. Bangkok, Thailand (in Thai).
NESDB (National Economic and Social Development Board). 1991. The Seventh National Economic and Social Development Plan (1992-1996). National Economic and Social Development Board, Office of the Prime Minister, Bangkok, Thailand (in Thai).
NESDB (National Economic and Social Development Board). 1996. The Eighth National Economic and Social Development Plan (1997-2001). National Economic and Social Development Board, Office of the Prime Minister, Bangkok, Thailand (in Thai).
OAE (Office of Agricultural Economic). 1981. Cropping Pattern for Farm Planning. Agricultural Economic No. 76, Agricultural Economics Research Division, Office of Agricultural Economics, Bangkok, Thailand (in Thai).
OAE (Office of Agricultural Economic). 1999. Agricultural Statistics of Thailand Crop Year 1997/1998. Centre for Agricultural Statistics, Agricultural Statistics No. 31/1999, Office of Agricultural Economics, Ministry of Agriculture and Cooperatives, Bangkok, Thailand (in Thai).
ORDB (Office of the Royal Development Project Board). The New Theory. Pubic Relations Division, Office of the Royal Development Project Board, Bangkok, Thailand.
Pinprayong, Arunee. 1995. Intensive Integrated Farming Systems in Thailand. Paper presented to the FAO Regional Meeting in Asia and the Pacific, at Swanminathan Research Foundation, Madras, India, February, 1995.
Punpleng, Athi. 1995. The Role of Department of Agricultural Extension in Agro-Industry Promotion. Paper presented to Asian Productivity Organization. Study Meeting on Adaptation of Productivity Techniques in Agriculture at Manila, Philippines, 21-25 August, 1995.
Vanitcharuk, Sivasak and Woottinai Yuwananonta. 1997. Production and Marketing of Agricultural Product. Workshop on Production and Marketing of Agricultural Production. International Cooperation Development Fund (ICDF) at Taichung District, Institution Agricultural Station, Taiwan, Republic of China, 3-23 September, 1994.

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http://www.fao.org/docrep/003/x6906e/x6906e0c.htm#CROP%20DIVERSIFICATION%20IN%20THAILAND%20Chavalvut%20Chainuvati*%20and%20Withaya%20Athipanan**

CROP DIVERSIFICATION IN SRI LANKA - S.S.B.D.G. Jayawardane* and L. A. Weerasena**

Director General of Agriculture, Department of Agriculture, Peradeniya, Sri Lanka.** Deputy Director (Research), Regional Agriculture Research Centre, Angunakolapellessa, Sri Lanka.
1. INTRODUCTION
Sri Lanka is an island in the Indian ocean located between 79° 50' and 82° longitude and 6° and 9° 50' latitude. The total land area of the island is 6.5 million hectares and the population is 19 million.

The extent of irrigable land in the country has been increased to 483,000 ha including 80,000 ha of well drained upland with the commissioning of lands under the Mahaweli river system and other major irrigation schemes in the post independence era resulting in a breakthrough in rice production. Sri Lanka has become nearly self-sufficient in rice production. However, cultivation of rice in well drained soils in major irrigation schemes is considered to be a waste of irrigation water due to high percolation rates observed. Cultivation of non-paddy crops in the well drained soils could save water and thus pave the way for crop diversification in major irrigation schemes.
The cost of rice production has increased tremendously during the past few decades and consequently rice production has become uneconomical in marginal rice lands, especially in the wet part of the island. Therefore, more lands have become available for crop diversification. The potential areas of crop diversification in the island are found in different ecological settings. Cultivated crops and cropping patterns adopted vary with the agro-ecological conditions. Hence, the definition of crop diversification contains an extensive meaning for Sri Lanka. Thus it could be defined as the cultivation of alternative crops or adoption of alternate cropping patterns instead of traditional crops and cropping patterns.

1.1 Climate
Sri Lanka is located in the tropical belt of the world climatic map. The central hills of the country divide Sri Lanka into three major climatic zones by acting as a barrier to the monsoon winds. The three major climatic zones are named as wet, intermediate and dry zones which receive an average annual rainfall of >5000-2500 mm, 2500-1750 and 1750-900 mm, respectively. Further, three main regions in the island have also been identified, based on elevation, namely, the low country (0 - 300 m), mid country (300 - 900 m) and up country (>900 m). These climatic zones are further sub-divided into 24 agro-ecological regions, each one being more or less uniform in climatic conditions and in soils. Major irrigation schemes are predominantly found in the dry zone and a few are found in the other two zones. Rainfed wetland rice cultivation is mainly practiced in the wet zone.

1.2 Soils in the Crop Diversification Areas
Characteristics of soils have a key impact on crop selection. The major soil groups in the regions where the diversification has taken place are briefly described as follows:
Reddish Brown Earth Soils (Haplustalfs and Rhodustalfs)
These soils are reddish to reddish brown in colour and found in the upper and mid slopes of the landscape in the dry zone. The normal depth is about 1.0-1.2 m. and the water holding capacity ranges from 100-140 mm/meter depth of soil. The steady infiltration rate ranges from 1-5 cm/hr. The percolation rates of the wet puddled soils for the first time exceeds 100 mm/d and remains at a higher value of 10-20 mm/d even after 6 years of continuous puddling.

Low Humic Gley Soils (Tropaqualfs)
These are greyish soils found in the valley bottoms of the undulating topography. Soils are deep and moderately fine textured. Water percolation rate remains at 2-4 mm/d after 6-10 years of continuous paddy cultivation with puddling. Due to the low percolation rates suitability for crop diversification is very low in this soil group.
Non Calcic Brown Soils (Haplustalfs)
These soils are found in the upper and mid slopes of the landscape and well to imperfectly drained areas. Percolation rate may vary from 1-20 mm/hr. There is a high potential for crop diversification in these soils during the dry season. However, coarse textured members of this group are low in productivity.
Old Alluvial Soils(Tropaquents)
These soils occur in old river terraces. They are generally imperfectly to poorly drained with high infiltration rates of 5-40 cm/hr. The water holding capacity is low as 40-80 mm for a meter depth of soil. These soils are low in productivity.
Alluvial Soils (Tropaquents and Tropofluvents)
These soils are reddish to brownish in colour, moderately fine textured and imperfectly to poorly drained. The majority of these soils occur in flood plains and these soils are generally deep. These soils are more suitable for rice cultivation.
Red Yellow Podzolic Soils (Rhodudults and Tropudults)
These are the most widely spread great soil groups found in the wet zone of Sri Lanka. They occur in diverse landforms and are normally deep. Predominant textural classes of surface soils are sandy loam, sandy clay loam or loam and the structure is usually weak or moderate with crumb or granular structure. Soil reaction is acidic and the cation exchange capacity may vary from 2-10 c mol kg-1 in surface soils.
Reddish Brown Latosolic Soils (Rhodudults and Tropudults)
Reddish brown latosolic soils are the next prominent soil group found in the wet zone of Sri Lanka. Most of these soils occur on terrains that have been incised by ecological erosion. These soils are relatively young. The texture is mostly sandy clay loam and the structure is strong crumb to granular under natural vegetation. These soils are normally deep, soil reaction is slightly acidic and the cation exchange capacity may vary from 4-15 c mol kg-1 in surface soils.
Immature Brown Loams (Eutropepts and Dystropepts)
These are young soils occurring in close association with Reddish brown latosolic soils and are mostly found in the wet and semi-wet intermediate zones of the country. Soil texture is predominantly sandy loam or loam. Structure is often weak crumb or subangular blocky. Soil reaction is acidic in the wet zone and the cation exchange capacity can vary from 1-20 c mol kg-1 in surface soil.
Alluvial Soils (Troporthents and Ustifluvents)
These soils occur mostly in the flood plains and also in valley bottoms in the mid-country wet zone. They are usually deep and variable in drainage and texture. Structure is variable, ranging from well developed to weak. Soil reaction is acidic and the cation exchange capacities may vary from 5-20 c mol kg-1.
Bog and Half-bog Soils (Tropohemists and Troposaprists)
These are mainly confined to the low-lying lands of the west and southwest of the island. These are poor in drainage and rich in organic matter. Strongly acidic, this soil group is low in productivity.
2. CROP PRODUCTION AND ECONOMIC SCENARIO
The contribution of the agriculture to GNP increased by 4.4 percent in 1999. However, the share of the agriculture sector in the GDP gradually reduced during the last three decades from 30.3 to 21.1 percent. In 1999, the share of the agriculture sector in the GDP was 20.7 percent. The reduction of the share of the agriculture sector was primarily due to the fast growth in the industry and services sectors during the past two decades.
Table 1 shows the extent, production and trade of the plantation crops and rice in Sri Lanka. It is clear that the country is producing less than 50 percent of its sugar requirements.
Table 1. Major Crops, Their Extents, Production and Trade
Crop
Area 1,000 Ha
Production 1,000 Mt
Export 1,000 Mt
Imports 1,000 Mt
Tea
195
284
268
-
Rubber
159
97
43
-
Coconut
439
2808 mil nuts
916.48 mil. nuts
-
Rice
781
2868
1.53
214
Sugar cane
7,976
399
-
479

Table 2. Extent, Production, and Imports of Major Field Crops in 1999
Item
Extent (ha)
Production (Mt)
Imports (Mt)
Chilli
21,751
60,031
20,260
Big-onion
4,597
62,729
83,960
Red-onion
6,151
42,648
2,060
Potato
2,171
27,175
128,862
Maize
28,904
31,471
58,956
Finger millet
6,797
5,137
277
Sesame
8,654
4,775
1,091
Green gram
15,362
13,805
7,258
Black gram
8,658
6,730
4,928
Groundnut
10,276
6,540
4,348
Soybean
822
797
1,830
Sweet potato
8,383
51,582
-
Source: Department of Census and Statistics.
Table 2 shows the extent, production and imports of the major field crops in Sri Lanka. These figures further explain that Sri Lanka is largely dependent on the important of field crops, irrespective of their feasibility for cultivation in the island.
Table 3. Production Area and Imports of Major Fruit Crops in Sri Lanka, 1999
Crop
Area (ha)
Production (1,000 Fruits)
Exports (Mt)
Imports in 1998 (Mt)
Banana
48,075
3310,600 bunches
1.250
9,000
Cashew
21,218
1898,326
149.803
-
Lime
6,955
117,663
-
-
Mango
25,800
431,214
3.658
-
Orange
3,464
23,998
0.081
5,602.199
Papaya
3,476
26,874
2.184
21.925
Passion fruit
425
6,202
-
-
Pineapple
4,774
32,626
2,102.069
-
Grapes
-
-
-
1,486.46
Source: Department of Census and Statistics.
Imports: Department of Customs.
Total export of fruits was around 7,000 Mt in 1999 and the total production of vegetables has been estimated to be 554,641 Mt in 1999. Table 3 shows that Sri Lanka imports mainly grapes and oranges.
Table 4. Production of Export Crops in 1999
Crop
Production (Mt)
Coffee
2422
Cocoa
1538
Cinnamon Bark
11503
Leaf oil
139
Pepper
4557
Cloves
1902
Cardamom
70
Citronella oil
108
Nutmeg
1335
Source: Central Bank Reports 1999
The total land area under export crops was 91,106 ha and the total earnings reached Rs. 11,598 Million in 1999.
3. PATTERNS OF CROP DIVERSIFICATION
Crop diversification in the country has taken place in different agro-ecological settings. The governing factors behind this diversification in each setting were different and furthermore, the diversification occurs independently in different agro-ecological regions in different time periods. The major agro-ecological settings where crop diversification has been achieved can be identified as follows:
a) Low country Dry zone - Major Irrigation schemes.
b) Low country Dry zone - Minor irrigation schemes.
c) Up, mid and low country Intermediate zones - Anicut schemes and rainfed rice fields.
d) Low country wet zone - Wetland rice fields.
e) Mid country - Marginal tea and rubber lands.
3.1 Crop Diversification in Major Irrigation Schemes
Most of the planning for irrigation schemes took place in the latter part of the 1950's and in the 1960's. A large extent of land was opened for irrigated cropping with the implementation of these plans. Rice varieties with high yielding ability and better agronomic practices for rice cultivation were also developed in the same period and as a result, rice production was expected to surpass the level of self-sufficiency. In order to overcome a possible saturation of rice production, the government planned to introduce crop diversification to the major irrigation schemes. In addition, they realized the importance of cultivating non-rice crops to obtain the best returns from the resources such as land and water. The new irrigation systems were designed with facilities for irrigation management for crop diversification. Land terrain was developed to cultivate non-rice crops in well drained and rice on poorly drained land classes. Although farmers preferred to cultivate rice in all land classes irrespective of the hydrological regimes, government policies and the attractive prices for non-rice crops, which expanded the margin of profit encouraging them to grow non-paddy crops in well drained land classes.
There are nearly 80,000 ha of well drained lands in the major irrigation schemes available for upland crop cultivation and from this 12,000 ha of lands are at present under sugar cane and a sizeable portion has been cropped with banana. Rice and other annual field crops could be cultivated alternatively in the wet and dry seasons in the rest of the land available. Cultivation of annuals in the dry season saves water for the wet season rice crop. Growing field crops in the wet season is often hampered by heavy rains experienced due to the build up of excess moisture in the root zone forcing the farmers to cultivate rice in the wet season.
There are a few other sub-patterns that could also be identified within the diversification in major irrigation schemes (Figure 1).
Figure 1. Schematic Representation of the Different Diversification Patterns in Major Irrigation Schemes
i. Semi-perennial irrigated crops in well drained and rice in poorly drained land classes.ii. Wet season rice in all land classes and dry season non-rice annuals in well drained and rice in poorly drained land classes.
iii. Rice in both wet and dry seasons and a short duration grain legume in-between the two seasons.
The dominant crops in the first sub-pattern are sugar cane, banana and papaw while chillies, onion, groundnut, vegetables and grain legumes are the dominant crops in the second pattern. Mungbean (Vigna radiata) is the crop that could commonly be observed in the third sub-pattern.
3.2. Crop Diversification in Minor Irrigation Schemes
Minor reservoirs with less than 40 ha command area come under this category. These are predominantly rainfed reservoirs, which contain the water derived from the immediate catchments. Usually, these tanks are filled during the rainy season but the water storage during the dry season is not sufficient for rice cultivation. There are nearly 185,000 ha of irrigated lands in the command area of minor tanks. The majority of the soils in these systems are either imperfectly drained or poorly drained and not suitable for non-rice crops. However, farmers grow them in minor irrigation schemes by avoiding the short rainy period (April, May) in the dry season (Figure 2).
Figure 2. Schematic Representation of the Different Diversification Patterns in Minor Irrigation Schemes
In minor irrigation schemes, wells are often dug to tap the shallow ground water table boosting the availability of irrigation water during dry periods. This has become very popular today and there are several thousand such wells that could be found in the island. The extent of cultivation by each well ranges from 0.25 ha to 0.5 ha depending on the availability of water. A variety of crops could be found in association with such wells, which range from semi-perennial fruit crops such as banana, papaw and lime to vegetables. In certain cases these farmers tend to cultivate non-rice crops even during rainy seasons by improving the drainage conditions of the soils.
3.3 Crop Diversification in Paddy Lands in the Intermediate Zone
The source of irrigation water in upcountry, mid and low country intermediate zones are mainly derived from anicut schemes and minor reservoirs. The landscape is rolling to hilly in the upcountry and mid country and undulating in the low country. Rice is cultivated in the wet season in terraced land in well to imperfectly drained soils. The attractive prices of vegetables and onion have encouraged the farmers to grow them in the dry season and they are cultivated in raised beds prepared within the basins. Occasionally, this vegetable production is affected due to high soil moisture condition occurring with heavy rains.
Figure 3. Schematic Representation of the Different Diversification Patterns in Paddy Lands in the Intermediate Zone
In the upcountry intermediate zone, potato is the major crop that covers a large extent of cultivated lands. Other dominant vegetables are tomato, beans, carrot, cabbage, beetroot and leeks. Presently, part of the extent under potato has been diversified into vegetables.
Potato is not cultivated in the mid country intermediate zone and onion, tomato, cabbage, tobacco, beans, shallots and capsicum are the principal crops found in this pattern. Cucumber, gourds, long beans, okra and capsicum are the leading vegetables grown in the low country. Melon is the only fruit crop cultivated in this part of the diversification pattern (Figure 3).
3.4 Wetland Rice Fields in the Low Country Wet Zone (LCWZ)
In the low country wet zone there are 8,681 ha under major irrigation schemes, 18,016 ha under minor schemes and 68,118 ha under rainfed conditions. The average yield of rice in the region is about 3,000 kg/ha and it has become uneconomical to cultivate rice due to the high cost of production. Also, this area represents the densely populated region where about 40 percent of the total population of the country are found.
A major portion of the paddy lands in the wet zone is very poorly drained and hence unsuitable for upland crop cultivation. The upper order valleys of coarse textured soils are fairly well drained and these soils are presently used for crop diversification. Apart from the prevailing soil physical status, crop selection seems to be dependent on the availability of marketing facilities. In close proximity to urban centres, leafy vegetables are predominantly cultivated, as these fetch a high price and the crops can be grown throughout the year. Other crops cultivated in the low country wet zone are the root and tuber crops (coleus and sweet potato), and vegetables such as long bean, bitter gourd and okra (Figure 4). Banana is the major fruit crop grown in this area.
Figure 4. Schematic Representation of the Different Diversification Patterns in the Low Country Wet Zone
Table 5 shows the costs and returns of this diversified system.
Table 5. Cost and Returns of Diversified Cropping in the Low Country Wet Zone
Indicator
Paddy
Vegetables
Coleus
Leafy Vegetables
Total cost Rs/ha
334,625.00
76,175.00
97,530.00
275,298.00
Gross returns Rs/ha
32,856.00
303,500.00
144,738
397,943.00
Returns to land Rs/ha
6,055.00
226,883.00
47,208.00
122,645.00
Returns to capital unit
1.51
4.72
2.51
1.59
Returns to labour Rs/manday
213
954.00
318.00
250.00

The table clearly shows that returns to the land are negative in rice whereas all the other alternative crops give higher returns. Returns to capital and labour are more favourable in vegetable and Innala (coleus) cultivation.
3.5 Diversification in Mid Country Marginal Tea and Rubber Lands
The seedling tea plantations became marginally productive in the mid country wet zone due to the decline in tea prices, rise of input costs and also due to the soil degradation aggravated by soil erosion. Some of these lands were replanted with vegetatively propagated tea and a part of these lands was shifted to export crops, mainly pepper, cloves and cocoa.
Similarly, poorly managed rubber plantations also became marginal with the reduction in prices as the demand for natural rubber was reduced. The cost of production also increased due to the high wage rates and these conditions led the rubber smallholder to withdraw from rubber and shift towards vegetatively propagated tea cultivation.
3.6 Diversification Around Upland Crops
A diversification trend was observed in some upland crops such as cowpea, onion, gherkin, potato and chillies during the past few years. This was mainly due to the decline in prices owing to over-production of crops, cheap importation and shrinking of export markets.
The potato production in the up country intermediate zone dropped drastically due to the reduction in prices as a result of the import of potato. Similarly, the extent under cultivation of onion and chillies also dropped due to importation of the two commodities. As a result, the lands under these crops reverted to paddy cultivation or to the traditional systems.
Gherkin, on the other hand, was produced in the dry and intermediate zones only for export purposes. However, due to the loss in export markets, gherkin farmers have switched back to their traditional crops.
Banana (Mysore variety) was traditionally grown under rainfed conditions in the wet zone. However, in the past few years it has been cultivated under irrigated conditions and due to the attractive income, the land extent under banana in irrigation schemes increased sharply. At present, prices have dropped mainly due to many socio-economic reasons. Papaw has become the succeeding crop in most of the banana plantations which became uneconomical in production.
3.7 Success Stories of Crop Diversification
There are several success stories in crop diversification in Sri Lanka. The most illustrative examples of crop diversification are:
· Chilli cultivation in the Mahaweli river project H area.
· Onion production in Dambulla (dry zone).
· Potato production in upcountry intermediate zone.
· Vegetable production in mid country intermediate zone.
· Sweet potato production in low country intermediate zone.
· Banana production in Udawalawe river irrigation scheme.
3.7.1 Chilli Cultivation in Mahaweli River Valley H Area
Two decades ago when the import restrictions were imposed, chillies were extensively cultivated in Mahaweli system H (a major irrigation scheme) mainly for dry chillies, under a crop diversification programme. This programme successfully met the chilli requirements of the country until import restrictions were relaxed. The attractive prices obtained for dry chillies resulted due to government policy on import restrictions, availability of proper varieties, quality seeds and the other support services which contributed to the high degree of success in chilli production. At present this situation has partly changed mainly due to the relaxation of import restrictions.
3.7.2 Onion Production in Dambulla (dry zone) Area
Onion cultivation in rice fields during the dry season was initiated in the mid country intermediate zone nearly two decades ago. Owing to the initial success, onion production spread towards Dambulla (Low country dry zone) producing a fair percentage of the national requirements.
However, this production was restricted only to the cultivating season and could meet only part of the demand mainly due to the poor storage characteristic of the produce. With the relaxation of import restrictions the onion extents in this area declined resulting in a fall in production.
3.7.3 Sweet Potato Production in Low Country Wet and Intermediate Zones
Sweet potato was mainly cultivated only in well drained soils in the wet zone of Sri Lanka. In 1980, the crop was introduced to the minor irrigation projects in the Godakawela area of the low country wet and intermediate zones. Sweet potato was cultivated only during dry seasons in rice fields where rice was always the leading crop in the wet season. Owing to the success of the production effort, the cultivation extent increased rapidly and today this area accounts for about 20 percent of the national production of sweet potato.
3.7.4 Banana Production in 'Udawalawe' Irrigation Scheme
Banana is a water-loving crop that can be grown successfully in the dry zone with irrigation facilities. This crop was initially cultivated in the lands where the water supply was inadequate for rice cultivation. In 1986 there were only 251 ha of banana in the project area and today the extent has increased to nearly 4,000 ha with an average productivity of 25 t/ha/yr. Several reasons can be attributed for the success of this diversification programme. These are:
· Attractive income from the crop (SL Rs. 200,000 - 250,000/per ha/year).
· Strong agriculture extension programme.
· Presence of an efficient marketing network.
· Suitability of the land.
4. CROP DIVERSIFICATION AS A STRATEGY
4.1. Food and Nutritional Security
Currently, most of the key food crops are grown in the island. However, in order to meet the national demand a larger quantity has to be imported annually (Table 6).
Table 6. The National requirement of some of the essential food commodities in 2000
Crop
Requirement (Mt.)
Extent to be Cultivated (ha)
Present Production (Mt)
Maha
Yala
Rice
2,035,000
667,835
381,905
1,781,048
Dry chilli
34,100
17,040
11,780
15,000
Chilli green
285,00
5,440
11,780
15,000
Red onion
35,900
17,040
5,280
42,600
Big onion
126,000
165
4,640
62,700
Potato
101,300
3,000
2,560
11,759
Maize
166,000
34,005
4,175
31,400
Green gram
40,000
14,190
5,760
13,800

Table 6 clearly shows that there is a production deficit in the necessary food commodities. Hence, in order to meet the demand in the future, certainly the land extent under these crops needs to be increased. From the expected production of non-rice annuals, a major portion of green gram and maize can be produced under rainfed conditions. However, for crops such as onions, potato and chillies, the majority of the production is expected from irrigated fields under crop diversification.
Similarly, the per capita fruit consumption in Sri Lanka (5.0 kg/person/year) is far below that of developed countries (45 kg/person/year). There is no doubt that the production has to go up in order to increase the fruit consumption in the country. As a result, fruit crops that could be effectively produced in the island have been identified and it is already planned to increase the land extent under these crops, especially with supplementary irrigation.
In Sri Lanka, nearly 34 percent of the population is still living below the poverty level and in an under-nourished status. Their present level of protein intake is inadequate for optimal growth and development. The expansion of the production of pulses such as green gram, cowpea, soybean and groundnut has to take place to at least supplement part of their protein requirements.
4.2 Income Growth, Poverty Alleviation and Employment
As an outcome of the socio-economic changes that occurred during the last few decades some production systems became uneconomical to operate. Rice cultivation in the wet zone and the marginal tea and rubber lands in the mid country are two examples in this regard. The wetland rice cultivation extent of nearly 94,815 ha and the marginal tea and rubber extent of about 50,000 ha were affected by these changes. This development certainly affected the income level of those dependent on these production systems. As described earlier, crop diversification would generate better income from these lands and transform the marginal operations into profitable enterprises.
There are about 195,000 ha of land available for crop diversification in the dry season. On the other hand, the production of non-rice crops requires more labour throughout the year compared to rice which has only a seasonal demand. Therefore, cultivation of non-rice crops would generate more employment opportunities. In addition, diversification may lead to an increase in production of non-rice crops and may create more opportunities for agro-based industries to be developed. Such a change would undoubtedly generate more income, employment and help to alleviate poverty.
4.3 Judicious Use of Land, Water and other Resources
The well drained soils in the major irrigation schemes have high percolation rates exceeding 100 mm/d. Cultivation of rice in these soils provides low returns for each unit of water used for cultivation. On the contrary, cultivation of non-rice crops need less water and provides relatively higher returns to each unit of water used. Since the cost of irrigation water is fairly high, it is a pre-requisite to use this resource in the most effective manner. Meanwhile, the selection of crops based on the land classes can be practiced effectively. The appropriate crop selection would assure the productivity of the crop, improve the soil conditions and also favour the environment. Crop diversification provides an opportunity for the farmers to shift from one crop to another, depending on market prices and productivity.
5. CHALLENGES AND OPPORTUNITIES
5.1 Constraints in Crop Diversification
Constraints to crop diversification in the island can be grouped into five categories. They can be named as physical, agronomic, economic, social and management constraints.
5.1.1 Physical Constraints
Crop diversification has to be practiced with non-rice crops in the island. Non-rice crops cannot tolerate excess soil moisture and prefer well drained conditions. There are only 80,000 ha of such lands available in major irrigation schemes. In minor irrigation schemes almost all the soils are imperfectly to poorly drained. The situation is even worse in the wet zone where high rainfall and frequent floods often make excess soil moisture conditions unsuitable for growing highland crops.
Land configurations of most of the irrigated rice fields do not favour the use of machinery, especially in well drained parts of paddy tracts. This situation prevents the farmer from using even medium scale machinery for land preparation and increases the cost of land preparation. In addition, due to the requirement of two different ways of land preparation, more energy needs to be utilized. This discourages the farmer from practicing such land preparation as it also increases the cost of production.
5.1.2 Agronomic Constraints
The majority of the upland crops cultivated in Sri Lanka do not tolerate excess soil moisture and water saturated soil conditions and hence the farmers are left with only a few crops such as sugar cane, soybean and leafy vegetables that tolerate excess moisture to some extent.
In rice and non-rice cropping patterns, non-rice crops of the 12-16 weeks age class are preferred and most of the cash crops exceed this age limit. On the other hand, crops in a preferred age group, for example pulses and maize, do not generate sufficient income to be attractive alternative crops. Certain crops such as okra and groundnut, which tolerate excess soil moisture, get affected by viral diseases such as mosaic virus when cultivated in the dry season.
5.1.3 Economic Constraints
Diversified cropping demands high input conditions and this leads to increase in the cost of production. As most of the diversifiable crops are seasonal, production comes to the market within a short interval. In addition, most of this produce is perishable in nature and cannot be stored at farmer-level for a long period. Consequently, market prices fall during the harvesting period. In certain situations traders deliberately lower the prices to obtain high profits for them. The open economic policy that became effective during the past two decades relaxed the import restrictions. The lower world market prices of these food commodities encouraged the import of these items, reducing the market price in local markets. The effect of the combination of all these conditions lowers the overall profit margin for the farmer and they are compelled to shift towards easy crops, and in most cases, this is rice.
In addition to the above scenario, unavailability of good quality seed in time (e.g.: onion) also discourages some farmers from the cultivation of non-rice crops.
5.1.4 Social Constraints
Traditionally, Sri Lankan farmers prefer rice cultivation for cultural reasons and they are also highly knowledgeable in rice cultivation but have little knowledge of upland crop cultivation. Hence, most of the farmers are reluctant to shift from rice to other alternative crops. Paddy on the other hand is an easy crop to cultivate for them and hence they find sufficient time to go for off-farm employment. However, with non-rice crops farmers cannot look for off-farm income though the returns are comparatively high. The absence of knowledge and the need for constant attention in non-rice crops restrict the old generation of farmers to move away from rice and it is the knowledge seeking youth who are mostly interested in cultivating non-rice crops. The majority of the youth are, however, leaving the farm to seek employment in other sectors. Land ownership is another obstacle in promoting non-rice crop cultivation in Sri Lanka. Land ownership is not always with the farmer and therefore farmers have no choice for crops as the decisions lie with the land owner. This situation was created as there was no way of assuring a guaranteed income from the non-rice crops. In addition, the tenancy for rice lands is legally protected in Sri Lanka.
5.1.5 Management Constraints
Irrigation schemes designed after the 1960's have facilities for irrigation management in crop diversification. However, irrigation schemes that have been implemented prior to this period were designed only for continuous water supply. Hence, rotational irrigation, that is a must in non-rice cultivation, is difficult to practice in old irrigation projects.
Heavy rains that occur soon after irrigation or coincide with irrigation create excess water conditions which are detrimental to upland crops. Present irrigation systems do not enjoy the ease of immediate water regulatory facilities between head works and the peripheral distributaries. Therefore, enhancement of water regulatory facilities is also needed for better crop diversification in the irrigation schemes.
5.2 Globalization and New Technologies in Crop Diversification
Generally, the cost of cultivation of all the crops is relatively high in Sri Lanka and in addition, the yields are comparatively low in relation to the subtropical and temperate countries. This could mainly be attributed to the climatic differences among the tropics, subtropics and temperate countries. Due to low yield and high cost of cultivation the prices of agricultural commodities are relatively high. Therefore, options are very much limited for exporting vegetables, pulses or grains. In contrast, importation is continuously taking place as the import restrictions have been relaxed. This situation adversely affects local agricultural production and hampers the crop diversification effort.
The production of condiments such as pepper, cinnamon, cloves and cardamoms has comparative advantages. But expansion of those crops to non-traditional areas, where such cultivation is not being practiced, is very much limited as these require special climatic conditions. Introduction of varieties of condiments that perform well within a large range of climatic conditions is a challenge for the researchers in their respective fields. In this situation, biotechnology can be used for developing new varieties and propagation techniques such as tissue culture can be used more effectively for the expansion of new crop varieties.
With the open market system, the involvement of government in planning is limited and furthermore, the decisions are now being made by agricultural entrepreneurs. Hence, before entering into any agricultural enterprise, farmers are required to decide on the crops, type of technology etc., and they also need to forecast and anticipate the fluctuations in prices, marketability of the produce, extent of cultivation and the expected total production to avoid future gluts and major price slumps. Similarly, information on the land, soil type, crop suitability etc., should also be useful for the future agriculture entrepreneur. There is a need to have an institution to provide such information to support the decision making of the agriculture producer as well as the traders. In this system both farmer and traders should be able to collect information conveniently.
5.3 Institutional and Infra-structural Development Towards Crop Diversification
5.3.1 Institutional Development
Farmer organizations at different levels of the irrigation schemes are required for effective crop diversification programmes. Such organizations facilitate effective irrigation management, supply of inputs and organizing marketing facilities. This requirement is effectively met in almost all irrigation schemes in the island and the Irrigation Management Division attached to the Irrigation Department is responsible for the activity.
There is a fairly effective agriculture extension network present in the country. It is presently handled by the Department of Agriculture at both provincial and inter-provincial level and by the Mahaweli Economic Agency in the major irrigation schemes. In addition, there are several non-governmental organizations that take certain extension messages to a limited section of the farmers. However, the extension service suffers from lack of sufficient staff at village level to take the extension messages across to the farming community. Therefore, an increase in strength of extension agents at village level is needed to improve the efficiency of the extension service.
The Department of Agrarian Services mainly handles the minor irrigation schemes and is also responsible for supplying inputs and purchasing certain farm produce to a limited extent.
5.3.2 Infra-structural Development
Modern irrigation schemes designed after the 1960's were completed with the following basic facilities:
- Canal system with high canal capacity.
- Gates and regulators for efficient irrigation control.
- Access roads to each and every allotment.
However, the experiences in the last decade show that food and fruit processing factories at regional level are necessary to deal with the problem of seasonal excess production of crops to ensure good market prices for agriculture produce, thus facilitating the diversification process.
6. GOVERNMENT POLICIES AND STRATEGIES FOR CROP DIVERSIFICATION
Government policy was to reach self-sufficiency in most of the essential food crops after independence. Hence, government set strategies to fulfill the above policy were:
a. To increase the extent under cultivation during the last four decades, the government planned and commissioned several major irrigation schemes and increased the irrigable land extent to 483,000 ha.b. Seed and planting material production was handled mainly by the government institutions and seed farms were operated to meet the national demand of seed and other planting materials. Importation of seed potato was mainly handled by the government.
c. Subsidy schemes were formulated to encourage high input usage, especially fertilizer which was provided under the subsidy.
d. Crop insurance was introduced to minimize risks.
e. Guaranteed prices or minimum prices were set and marketing was sufficiently intervened to activate the pricing policy. Government institutions such as the Paddy Marketing Board and the Marketing Department were established to purchase the agriculture produce.
However, with the introduction of an open market system in the early 1980's some of those policies were relaxed. Subsidy for fertilizer was reduced and the private sector was primarily responsible for marketing the agriculture produce. The government institutions for marketing were not functioning effectively. Although there was a minimum price for most of the commodities, the government could not maintain it as the state institutions responsible for marketing were ineffective. Government involvement in seeds and other planting material production was reduced to a substantial degree and the private sector participation was encouraged and promoted. The cost of production of crops increased as the fertilizer subsidy and most of the direct and indirect subsidies were reduced.
Although the import restrictions were relaxed, a certain level of protection was maintained. However, these measures were not sufficient to avoid the decline in local production of chillies, onion, pulses and potato to a significant extent.
Currently, the government adopts the trade liberalization policy where GATT, SAFTA and other regional trade agreements promote free trade. This makes most of the crop production at the existing level of technology under the present wage rate comparatively disadvantageous. Hence, the imported produce competes with the local commodities and deprives the local farmer of his self-employment. For example, the extent of potato cultivation, which was 4,430 ha in 1996 dropped to 1,119 ha during the last three years. However, the production area of condiments such as pepper and cinnamon has increased as Sri Lanka has a significant comparative advantage in condiment production.
7. CONCLUSIONS
· There is good potential for crop diversification in Sri Lanka and this potential is well realized in major and minor irrigation schemes except in the wet zone of Sri Lanka.· The diversification patterns in rice lands in the intermediate zone of the up country and mid country have been successfully established. Diversification in major irrigation schemes in rice lands of the low country wet zone is also operated with limited success. However, the stability of the system largely depends on the market prices of agricultural produce.
· Susceptibility of crops to excess moisture is the major physical constraint in all rice-based crop diversification systems. Insufficient number of available candidate crops is a major constraint in all diversification patterns.
· Since market forces are the driving force for diversification, efficient operational systems encompassing a decision support system have to be developed. The diversification enterprises must also suit the international and regional trade policies.
· Infrastructure development of agriculture enterprises and agro-based industries is necessary for further promotion of the diversification programmes.
REFERENCES
Annual reports, 1999. Central Bank, Sri Lanka.
Dimantha, S. 1987. Irrigation management for crop diversification in Sri Lanka. p. 135-150. In Irrigation management for diversified cropping, International Irrigation Management Institute, Digana, Sri Lanka.
Hemaratna, H. A. 2000. Economics of crop diversification in paddy lands in low country wet zone in Sri Lanka. Unpublished.
Jayasekara, S.J.B.A., R.P.K. Kannangara, 1991. Sri Lanka. In Agroclimatology of Asian Grain legumes. Research Bulletin No. 14 Ed. By Virmani, S.M., D.G. Faris, and C. Johansen, ICRISAT, Patanchery, Andrapradesh, 502324, India.
Mapa, R.B., Somasiri S. and S. Nagarajah. 1999. Soils of the wet zone of Sri Lanka p.184 special publication No. 1. Soil Science Society of Sri Lanka, Vidya Mandiraya 120/10, Wijerama Mawatha. Colombo 07, Sri Lanka.
Panabokke, C.R. et. al. 1987. Status research report, Sri Lanka. p. 171-196. In Irrigation management for diversified cropping, International Irrigation Management Institute, Digana, Sri Lanka.
Panabokke, C.R. 1989. Irrigation management for crop diversification in Sri Lanka, country paper, Sri Lanka, No. 3, International Irrigation Management Institute, Digana, Sri Lanka.
Panabokke, C.R. 1996. Soils and agro-ecological environments of Sri Lanka. P. 220. Natural resource service No. 2. Natural Resource and Science Authority of Sri Lanka. 47/5, Maitland place, Colombo 07, Sri Lanka.
Upali, U. 2000. Crops grown in upcountry intermediate zone. Unpublished.

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