Dynamics of physical properties of typical black earth at its different cultivation

Abstract

Aim. A study of influence of minimization of till of soil is on physical properties of black earth typical and their dynamics during the vegetation of agricultural cultures. Methods. Field and laboratory. Results. Found out a substantial difference between the dynamics of physical properties of black earth typical during a vegetation at the different systems of till of soil. The dynamics of closeness of stowage, porosity of airing and hardness of soil during a vegetation period is presented. Conclusions. For ploughings there were the least indexes of closeness during a vegetation. Variants with shallow and till were characterized by the critical values of closeness (1,75-1,84 gs/of cm3) in a droughty period of vegetation in the zone of formation of «nidophoi sole». Dynamics of hardness and closeness of stowage of soil during a vegetation analogical, however the critical values of hardness during a vegetation in a layer were not observed. Porosity of airing of soil went down to the critical values (<10%) only at till in the second half of vegetation in the area of sole».