Abstract
Soil pollution with Cr, Cu, Ni, and Pb oxides and with oil products in the Adygea Republic leads to the deterioration of the soil biological properties. According to the degree of deterioration of the biological properties, the soils of Adygea may be arranged into the following sequence: brown forest soils > mountainous meadow (subalpine) soils > gray forest soils > soddy calcareous soils = leached vertic chernozems. With respect to the negative effect of heavy metal oxides on the biological properties of the soils, they form the following sequence: CrO3 > CuO = PbO ≥ NiO.
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