九州大学大学院農学研究院農業資源経済学部門国際農業資源開発・経営経済学講座農業経済学研究室
Laboratory of Agricultural Economics, Division of International Agricultural Resources Economics and Business Administration, Department of Agricultural and Resource Economics, Kyushu University
This paper analyzes empirically the profitability and determinants of low input sustainable rice farming (LISRF), by using the farm survey data from Kyushu, a region in southwest Japan. Compared to conventional farming methods, LISRF systems generated almost twice the farm income, and 5-6 times higher the net farm income on a per hectare basis, due to less yield loss and labor increase, as well as distinctively higher product prices. A two-step regression procedure and farm survey demonstrate that farmer's efforts both in substituting synthetic pesticides and fertilizers by the LISRF systems as well as in marketing, have significantly contributed to the improvement in farm income, while the effects of farm size and location are not found.