転作田における麦・大豆2毛作の成立条件に関する考察

抄録

There have been a problem which a rate of land use and unit yield of arviculture is low level to incr ease food selfsufficiency ratio. The purpose of this paper is to clarify the formation factors and conditions affecting long-interval arviculture crop rotation systems. The analysis was conducted using the case study method. The formation factors are as follows: 1) Income from the soybean crop exceeded that from paddy rice due to the fall in the price of paddy and the policy of rice supply adjustment. 2) Improvements in the physical properties of the soil led to an increase in the per unit yield of barley. The formation conditions are as follows: 1) This cropping system necessitates that the work be completed within a specific (short) time. 2) The system r equires many operators/a larger labor force (i.e., group farming) in order to be implemented.