THE CHANGE OF TOXICITY AND MICROBIOLOGICAL ACTIVITY OF SOIL UNDER THE INFLUENCE OF GREEN MANURE CROPS AND THEIR INCORPORATION
The level of toxicity depended on soil treatment: without treatment it amounted to 14.3%, which is 5% less than the treatment options. The least toxicity was different option with the processing of "Sun Flower" - 18,3%, which is 1.5% lower than the treatment of "ruby" and "ruby"+ PLN. Cover crops also had an impact on this indicator - toxicity soil at variants with their application on average was 20.3%, which is 9.3% higher than in the variants without them. So the least toxic was the soil in crops of mustard - 18,9%, in the crops of buckwheat and soybeans soil toxicity was approximately the same with 21.3% and 21.0%, re-spectively. The most intensive microbiological activity of the soil occurs in crops of mustard and soy. On variants without tillage cover crops play a negative role, the microbiological activity is reduced by 1.3-1.8 times for the variants with green manure. By incorporation of green manure increase the ability of cellulolytic microorganisms. The highest micro-biological activity of the soil all the green manure crops has been observed when processing the "Sun Flower" - 55, 45,8 and 65.5%, respectively, in crops of mustard, buckwheat and soybeans.