1987 Volume 49 Issue 4 Pages 362-368
Plowing with powered diskharrow plow under high moisture conditions of clay soils have induced the decrease of permeability in the layer below plowed soils. Therefore, it was investigated on conditions to add projected plates near the edge of disks in order to prevent the decrease of permeability in soils. In order to prevent the decrease of permeability in soils after plowing, the top edge of projected plates had to be directed outward from extension line of disk curvature, and the attaching pitch of projected plates of 8-13cm was an appropriate to cutting the plow soil pan. 5-6 projected plates were necessary to 22 inch disk in the peripheral velocity ratio of 3.5.
