Soybean production is largely based on soybean' s role as a minor component of cropping systems. In irrigated areas it is grown in paddy fields in the cool season. In upland areas it is planted in the early rainy season and intercropped with cotton. In the late rainy season it is intercropped with corn or more commonly grown after corn harvest. The day-neutral cultivars grown can be planted in any of the three seasons. Minimum inputs are used in soybean cultivation, and yields average 1 ton/ha. Production in these systems has provided a sufficient quantity to meet the national needs in soybeans which are largely used for food in traditional ways. Recently, production has not kept pace with the expanding demand for soybeans, especially as a protein supplement in animal feeds. Production packages available could double the present average yields. Economic incentives, efficient marketing and more effective technology transfer are needed to encourage farmers to adopt new technology. Mungbean is a major competitor in cropping systems.