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The formation of primary experimental material was carried out in the form of production seeding and field experiments. Among a large number of indicators assessing certain parameters of soil fertility from the point of view of fertility reproduction, stable characteristics determining agronomic soil value are of the highest importance For sod-podzolic soils, such characteristics are the granulometric composition, the content of organic matter and available forms of mineral nutrition elements, the acidity level. The impact on these indicators determines the effectiveness of soil improvement measures. Based on the generalization of experimental data, on the mathematical and statistical methods, the optimal parameters of these properties for specific crops were determined. To improve and manage soil fertility, it is also necessary to further develop special regulations related to soil enrichment with elements aimed at mineral nutrition of plants and humus. There are complex relationships between the doses of fertilizers and the specific accumulation of the relevant substances, which should be studied in special experiments.

Modeling of sod-podzolic soil fertility indicators optimization in the course of a field experiment