Biological Activity of Ordinary Chernozem
as Related to Slope Aspect

S. F. Shatokhina, S. I. Khristenko, and L. A. Zagorodnyaya

National Research Center, Sokolvskii Institute of Soil Science and Agrochemistry, Kharkov, 61024 Ukraine

Received March 15, 2002

Abstract—The slope aspect turned out to be a factor reliably determining significant differences in the annual
dynamics of the main taxonomic groups of microorganisms. The higher abundance of oligotrophic bacteria was
recorded in soils on north-facing slopes and that of eutrophic bacteria, in soils of watersheds. Micromycetes
and cellulose-decomposing microorganisms were more abundant in soils of south-facing slope, while actino-
mycetes, in soils of east-facing slopes. The reliable relationship between the humus content and the main micro-
biological and biochemical characteristics of ordinary chernozem was found on the basis of processing the data
by regression analysis.

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