Biodynamics of black soils leached under different agrotechnical practices in long-term field experiments

It has been indicated that the use of continuous fallow and monoculture farming systems tend to decline the soil humus content, transform the soil-absorbing complex, decrease rapidly the cellulose decomposition rate and the Fenzyme (oxidoreductase and hydrolase) activities, and sharply increase the phytotoxicity. The annual applications of fertilizers at the medium doses to corn in the crop rotation have favorable effects on the leached black soil fertility. However, their long-term applications in both the corn monoculture and the crop rotation can contribute to the insignificant increase in the soil actual and hydrolytic acidity.