Abstract
We studied the characteristics of the soil displacement for the rotary, crank and screw type tillage machines at the upland field of Utsunomiya University.
In this experiment, we put small pieces of chalk on and into the soil, and tilled, then by measuring the displacement of them we investigated the soil displacement.
(1) The values of the mixing ratio and the scattering ratio in middle stratum of soil are higher than the upper and lower one, and the values of them are shown in Table 3 (the scattering ratio) and Table 4 (the mixing ratio).
(2) The values of the inverting ratio and the burying ratio are lower than the mixing ratio and the scattering ratio in all cases.
(3) There are some correlations among the values of the mixing ratio, scattering ratio, inverting ratio and burying ratio that were calculated by the equations in preceding paper.
