Abstract
It is established on the basis of a statistical analysis of data on the yield of cereal and tilled crops and obtained regression equations that the yield on chernozems and gray forest soils is directly proportional to humus reserves in the 0–50 cm soil layer. From the standpoint of producing plant industry products, these reserves evaluate soil quality. In the case of their negative dynamics, technological expenditures will have to be increased to provide an increase in yield, a large part of which is needed for compensating the decrease in humus reserves.
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