CHANGING THE STRUCTURAL STATE OF THE SOIL TAKING INTO ACCOUNT THE COMPACTING EFFECT OF WHEELED TRACTORS

The results of studying the density of addition, porosity and other agrophysical properties of sod-podzolic light loamy soil under the action of running systems of tractors of class 2.0 (MTZ-1221 and JD 6290) are presented. It was found that with one tractor pass, soil deformation spread to a depth of up to 30 cm and 40-60 cm in the horizontal direction, depending on the weight of the tractor. Thus, the density of the arable (0-20 cm) layer of sod-podzolic light loamy soil increases from 1.42 (control) to 1.50 g/cm3 next to the trail of the MTZ-1221 tractor and 1.61 g/cm3 - on the trail of the JD 6290 tractor. In the subsurface (20-30 cm) layer, the addition density increases by 3.3%. With the removal in the horizontal direction, the degree of soil compaction decreased. The purpose of the conducted research was to develop agroecological requirements and to evaluate the complex of machine-tractor units when modeling the repeated long-term systematic impact of tractor propellers on sod-podzolic soil.