Abstract
From the perspectives of work efficiency and cost-effectiveness, we developed a compaction roller, consisting of a steel drum linked to a roller by a three-point hitch (total load: 960 kg, working width: 2 m), to prevent leakage on a direct-seeded dry paddy field in the North Kyushu region of Japan. In an evaluation of the roller’s performance in a field of gray-lowland-soil that tilled by a rotary tiller, we confirmed that there was a decrease in soil porosity and an increase in soil penetration resistance in the plow layer, as a consequence of an increased number of compactions. Moreover, there was a significant negative correlation between water permeation (basic intake rate: IB) and plow layer penetration resistance (average value of soil penetration resistance in the plow layer), indicating that roller compaction of the plow layer can contribute to permeability control.
