Abstract
In Hokuriku district, large areas of paddy fields can be classified as heavy clay soil . In heavy clay soils, wet damage inhibits barley and soybean production, and disrupts the 2 year, 3-crop rotation system (rice-barley-soybean). This paper evaluates the effect of the introduction of Rotary Tilling and Ridges-Making Implement, developed by the Hokuriku Research Center, on the crop rotation system. It is found that the introduction of the above implement alleviates the damage, and increases barley and soybean yields. The implement also improves work efficiency by reducing some work processes prior to soybean seeding. As a result, the introduction of this can increase agricultural income and land-utilization ratio under the 2 year, 3-crop rotation system.
