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Abstrak :
ABSTRACT
Cropping intensification in rainfed rice based farming systems through multiple cropping after the rice harvest by using residual soil moisture and supplemental irrigation offers a way to increase agricultural productivity and boost rural incomes in Northeast Thailand. This study identifies localities, planted areas, types of crops, and number of households growing crops after rainfed rice in Khon Kaen Province; it also analyzes some of the physical and social factors associated with the occurrence of this system. A questionnaire survey was conducted in 2013 of 198 agricultural extension officers in each subdistrict (tambol) in the province to collect data on multiple cropping. An area of 10,384 ha (2.9% of the total rainfed rice area) was used for multiple cropping by 16,184 households (10.9% of all rainfed rice farming households). Both field crops (e.g., cassava, crotalaria, field corn) and vegetables (e.g., sweet corn, watermelon, Chinese radish) were grown. These crops generated USD414 to 49,072 per hectare per crop for a total revenue of USD32 million, which is three times higher than the value of rice grown in the same field area. However, the area that can be utilized for multiple cropping in different subdistricts may be limited by physical conditions, including availability of irrigation sources and soil texture, as well as social and economic factors such as availability of markets, institutional support, and farmer skills.

Abstrak :
ABSTRACT
Paddy fields in Northeast Thailand are unusual in that they contain large trees. In recent years, however, in concert with major changes in the agricultural system of Northeast Thailand, including the shift from subsistence to cash crops, mechanization, use of chemical fertilizers, and increased reliance of rural people on manufactured consumer goods, the role of trees in paddy fields has also been changing, leading to a decline in tree densities. This study was conducted in Khok Kwang village, Khon Kaen Province, in order to examine factors influencing variations in density, canopy coverage, and origin of trees in paddy fields there. In recent years, the rate of tree cutting appears to have been increasing and the density of trees declining. This decline reflects many changes in agricultural practices in the village. Farmers now rely on chemical fertilizer rather than litter from the trees to maintain soil fertility. They no longer value any increase in rice yield during dry years in the parts of their helds that are close to the trees because they are now able to pump irrigation water to maintain productivity; and trees are seen as an impediment to the use of four wheel tractors, which have difficulty working efficiently in paddy helds with many trees. In addition, several farmers have begun to plant their paddy Iields with sugarcane, which is less shade tolerant than rice. The density of trees in paddy fields planted with sugarcane (5.7 trees/ha) is much lower than in helds where rice is cultivated (9.6 trees/ha). In upper paddies that are still planted with rice, the trees are retained because they provide valuable goods and services to the farmers and rice yields there are in any case low and unstable. This study illustrates at the micro level how changes in farmer goals, choice of crops, and production technology that are part of the agrarian transformation of Northeast Thailand are reshaping the rural landscape.

Abstrak :
ABSTRACT
Hybrid tomato seed production after rice is a way of intensifying agriculture in rainfed areas in Northeast Thailand. Although this type of intensive high value contract farming has been developing for the last 30 years, there has been little research on it. This study describes the historical development of this system and identifies factors influencing increases and decreases in the number of production sites and farmers producing hybrid tomato seeds. Although production of hybrid tomato seeds was initially adopted by a large number of farmers in many villages in both rainfed and irrigated areas, in recent years it has been carried out only in a smaller number of villages, mostly in rainfed areas. The decision of growers to continue or discontinue production is influenced by both the benefit they gain from production and their relations with the seed companies. The local availability of highly skilled hired workers also affects the concentration of production in certain sites.