Abstract
The biological activity of soil samples taken from genetic horizons of plowed and virgin chernozems in the Kamennaya Steppe Reserve was determined as the amount evolved from the soil upon its incubation in laboratory conditions. In the top humus horizons, the biological activity of virgin chernozem was two to three times higher as compared with that in the plowed chernozem. The intensity of biological processes and the microbial biomass in the soil profile was mainly controlled by the quantity and quality of soil organic matter. Long-term agricultural use exerted a weaker effect on the biological properties of chernozems developed on microelevations (blocks) of the paleocryogenic microtopography in comparison with chernozems developed in the microdepressions between the blocks. The factor analysis showed that soil characteristics related to the biological processes comprise more than 50% of the total variance of factor loads and are distinctly differentiated in the soil profile.
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Ivannikova, L.A. Biological activity in the profiles of chernozems as dependent on the character of their agricultural use and microtopography. Eurasian Soil Sc. 39 (Suppl 1), S98–S105 (2006). https://doi.org/10.1134/S1064229306130163
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DOI: https://doi.org/10.1134/S1064229306130163