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The work is devoted to the study of the granulometric composition of soils of 120-year and 240-year-old agricultural development of the meadow-steppe landscape on the example of the Belgorod region. In the lateral distribution of the silt fraction contained in the arable horizon, a significant increase of its share was found in the lower parts of the soil catenae of 120-year-old arable land; as for 240-year-old arable land, lateral fluctuations of the silt fraction are less noticeable. Average values of the silt content along the slope profiles of arable land of 240 years of age showed a local maximum of silt adjacent to the subsurface horizon. An inverse correlation was found for slopes on 120-year-old arable land, namely, the fact that the percentage of the depth silt fraction increased did not lead to an increase of the same fractions in the near-arable layer. In the soil sections of the studied catenae, numerous mole rat sod piles were found, especially many of them were detected at the depth of up to one meter. The average area occupied by mole rat sod piles on the walls of the average section is 80-90% on 120-year-old arable land and 70-80% on 240-year-old arable land. Mole rat sod piles occupy 30-40% of the walls of the soil sections on the soils of the background catenae. Mole rat sod piles are more common in the soils of the catenae of the northern slopes - both for 120-year-old and 240-year-old arable land.

vestnik ulʹânovskoj gosudarstvennoj selʹskohozâjstvennoj akademii

DISTRIBUTION OF SILT AND MOLE RAT SOD PILES ON THE PROFILE OF AGRICULTURAL SOILS OF CATENAE OF DIFFERENT PERIODS OF AGRICULTURAL DEVELOPMENT OF THE CENTRAL FOREST STEPPE