Agroecological features of chernozyoms in the Yenisei region of Siberia

The problem of effective use of biomachines capacity and regulation of circulation of substances in agriculture suggests the need for a detailed ac-count of agro-ecological features of soil combina-tions. The objective of the study was to identify the values of factors underlying the level of fertility of chernozyom soils in the Yenisei region of Siberia. Based on the research patterns of agrochemical, agrophysical properties of soil cover and meteoro-logical conditions revealed that the assessment of crop yields and the productivity of crop rotation on chernozyom should be based not only on indicators of soil fertility, but also on the parameters of the supply of rainfall. The need for nitrogen fertilizers was manifested when the content in the soil was below 15 mg of nitrate nitrogen in 1 kg of soil. Phosphate fertilizers increased the yield of agricul-tural crops when the soil was below 10 mg P2O5 per 100 g soil according to Chirikov. At higher lev-els of soil phosphate positive effects of phosphate fertilizers rows were achieved by way of application of superphosphate (15 kg P2O5 per hectare). The influence of potash fertilizers on the yield of agri-cultural crops in the experiments was not fixed.