Chisel Plow Tillage as a Mitigation Technique of Wet Damage at Paddy Field without Underdrainage

Abstract

Paddy fields are used not only for rice cultivation but also for cultivation of upland field crops such as barley and soybean. The cultivation of these upland field crops in paddy fields often involves wet damage. A tillage technique using chisel plows is thought to be a countermeasure for the wet damage at paddy field which is used for cultivation of both rice and upland field crops in the crop rotation system. We examined the effect of the chisel plow tillage by comparing water suctions of soil in root zone at a field with the chisel plow tillage and a field without during barley cropping season and soybean cropping season. As a result, we confirmed that the chisel plow tillage kept the water suctions of soil in ridge larger, and that can be used as a mitigation technique of the wet damage.