Changes in balk density and porosity of chernozem typical under different cultivation systems

Total porosity parameters were the lowest in variant of sallow soil cultivation to 10-12 ≿m. Variant of different-depth cultivation to 25-27≿m had total porosity parameters as under plowing, and the most optimal values were under different-depth cultivation to 25-27 ≿m with periodical loosening of soil to 50 ≿m. All types of tillage provide a good soil porosity soil at the time of seedlings, except shallow soil cultivation. As for aeration porosity, it was for all the best under the cultivation of corn for grain and was over 20%. The highest yield of corn was at variant of different-depth cultivation to 25-27 ≿m with periodical loosening of soil to 50 ≿m.