Economic effects of row seeding and upland crop production on the rice farmers' income.

摘要

This study examines the economic effect that the adoption of a row seeding system and the production of upland crops (soyabean, cucumber, and green bean) exert on local rice farmers' income in Vietnam. The study uses a linear programming model of rice farming in Omon district. It is revealed that the row seeding system has a higher comparative advantage compared to the broadcast seeding system since it produces more yield and has a higher profitability in terms of land and labour use. Upland crops are produced when the advantage of producing them is higher than that of rice, i.e. when they have a high profit coefficient. But since the time periods of cultivating rice and upland crops do not always conflict, rice remains cultivated by the farmers even if the profit coefficient of upland crops becomes higher.