Study on soybean throughput based on cultivated land resources restriction in China

Theoretical studies have been made systematically on the relationship between farm-land resources and crop productivity.After analyzing the economic benefit of soybean in North-east China and Huang-Huai-Hai Plain,studying the impact of resources and environment on soy-bean production,evaluating the maximum production scale in the main soybean producing area on the county level,the maximum production of soybean is estimated to be28～34million tons.Be cause there is serious spatial dislocation in soybean production and processing,the soybean trade strategy ofImportation into the South and Exportation out of the Northshould be carried out.Though the Sanjiang and Songnen plains in Northeast China Plain in have great potential productivity of soybean,and are also the main maize producing area,expanding soybean culti-vated area will inevitably result in the decrease of maize cultivated area.So considering the limit-ed farmland area,the integrated balance between farmland resources and farm produce should be studied.