In this study, the influence of species composition of tree stands of some chemical characteristics of leached brown, acid brown and cryptopodzolic soils, constituting the environments of deciduous and mixed mountain forest, was studied. The soils of beechwoods, fir forests, spruce forests and spruce-larch-pine pioneer crops were compared. The soils of fir forests and beechwoods and been considered unchanged. Using these soils as norms fоr comparison, the degeneration changes taking place under spruce forests and pioneer crops were evaluated. The influence of improper tree stands was visible only in the humic-mineral horizons, where pH and base saturation decreased, and the types of humus became impoverished. Planted spruce forests and pioneer crops have not yet caused degradation of soils or environments. Probably, after the recreation of tree stands, the soils will spontaneously return to their natural condition.