To increase agricultural production and productivity, the productivity of the change of crops (soybean, barley, etc.) needs to be improved. The purpose of this paper is to examine the current status of soybean production in mountain areas and analyze the implications of the unite yield of soybean and cultivation techniques, soil condition, etc. We conducted a questionnaire survey of community-based farming corporations in Hiroshima Pref. and have responses from 170 farms. The results are as follows: 1) Soybean unit yield in mountain areas is lower due to farm conditions and fewer labor resources. Efficient weeding techniques, new spices, and agricultural runoff techniques are needed. 2) Soybean unit yield depends on agricultural runoff conditions, input of improved soil material, and use of crop rotation.
