Organic Matter and Biological Activity of Postagrogenic Soils in the Southern Taiga Using the Example of Kostroma Oblastстатья
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Аннотация:The dynamics of the humus status (some indices) and the biological activity of agrosoddypod
zolic soils in the course of the natural forest regeneration were studied based on the example of the soils of
two succession series, which differed both in their parent rock and the history of their development. Upon the
overgrowing of the croplands, the humus content increased, and its distribution within the soil profile became
more differentiated. As a hayfield was overgrown, the humus content decreased to some extent at the earliest
stages. The parameters of the humus status more clearly changed in the succession series with the lighttex
tured soils, which had a relatively simple history of agricultural development. The biological activity mainly
decreased at the earlier succession stages and became higher with the increasing productivity and greater
amounts of easily decomposing falloff entering the soil. This relationship was especially distinctly revealed in
the grass communities.