The work was described on the ground of results which were given in Institute of Soil Science and Cultivation of Plants, Department of Soil Tillage in Jelcz-Laskowice and bibliography data from other country and abroad centers. It was the trial of whole explanation of the connection occurred between some soil properties of plughing and subsoil layers, as well as them effect on plant yields. The relation were joined with a run of rainfalls and there were qualified conditions of different kind plant responses on loosening subsoil layer. There was also proved that the critical soil bulk densities and strengths depend on soil moisture and the silt plus clay content in the subsoil layer.