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It is well known that there is a relationship between the productivity of forest phytocenoses and soil fertility, which is largely determined by the terrain and soil geomorphology. An important element of assessing the productivity of forests is the substantiation of the methodology for modeling the age dynamics of the growth of forest stands, depending on soil and ground conditions. The solution of this methodological problem is possible only if there is data on forest objects, represented by permanent sample plots and data from a detailed soil survey.

In large cities, soil pollution occurs with heavy metals. Forest stands react to environmental pollution by a decrease in growth and an increase in mortality. A typical object for the city of Moscow is the Timiryazev Academy Forest Experimental District. A comparison of the content of gross forms with the clark content of trace elements in the soil profile revealed a significant excess for the following chemical elements: copper, zinc, lead, arsenic. The content of chromium, nickel, vanadium is lower than the clark content. Comparison of the content of gross forms of trace elements with maximum permissible concentrations showed that the content of nickel, vanadium, cobalt is lower than the maximum permissible concentration. The distribution of the gross forms of the elements along the soil profile is heterogeneous. The maximum content in the profile of sod-podzolic soils falls on the humus horizon, which is associated with the biogenic accumulation of these elements.

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