BALANCE OF ORGANIC MATTER IN THE NON-CHERNOZEM ZONE OF THE OMSK REGION
The main indicator of soil fertility is the level of organic matter content, which depends on a number of factors and, above all, on the soil-climatic zone. In the north of the Omsk region, soils with a low level of natural fertility predominate. The humus balance has a negative value, since the rate of humus mineralization is much higher than its neoformation, and the applied volumes of organic fertilizers are not enough. Measures to eliminate humus deficiency should take into account the characteristics of each soil common in the region or farm.