Abstract
The short-range lateral variation of soil properties is a particular expression of the spatial soil variability and a non-directional short-periodic (in the range of a few meters) change in soil-profile features. Contrary to the soil cover pattern theory of discrete soil cover, the short-range variation of soil properties characterizes the soil cover continuum: the soil cover is presented as a field of various soil properties, and the boundaries of chosen ranges of soil properties may not coincide with boundaries of soil taxa. This study is based on soil data from three parallel transects (240 m long) laid on the watershed perpendicular to a 60-year-old shelterbelt and crossing it in their central part. The sampling step is 10 m on agricultural fields and 6 m under the shelterbelt. Features of the humus (the content of organic carbon in the 0–20 cm layer and the thickness of the humus horizon and profile) and carbonate (the effervescence depth, the carbonate content in the effervescence layer, and the horizon of maximal accumulation of carbonates) profiles are analyzed for 75 observation points. It is shown that the parameters of the humus and carbonate profiles of soils are characterized by periodic changes at intervals of 6–10 meters. The parameters of the humus profile are characterized by lower variation coefficients (<30%) than the parameters of the carbonate profile (>50%). The growth of trees on agrochernozems (Haplic Chernozems (Aric)) for 60 years resulted in the formation of new taxonomic components (postagrogenic agrochernozems (Haplic Chernozems)) characterized by a smaller lateral variation in soil properties as compared to plowed soils. Three soil types are specified within the studied area: agrochernozems (64 points; Haplic Chernozems (Aric, Loamic, Pachic)); clay-illuvial agrochernozem (7 points; Luvic Chernozems (Aric, Loamic, Pachic) and Luvic Chernic Phaeozems (Aric, Loamic, Pachic, Loamic, Pachic)); and clay-illuvial quasigley agrochernozems (4 points; Luvic Stagnic Chernic Phaeozems (Aric, Loamic, Pachic)), including eight subtypes.
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This study was supported by the Russian Science Foundation, project no. 19-17-00056.
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Translated by I. Bel’chenko
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Smirnova, M.A., Gennadiev, A.N. & Chendev, Y.G. Short-Range Lateral Variation of Humus and Carbonate Profiles of Agrochernozems (Belgorod Oblast). Eurasian Soil Sc. 56, 260–270 (2023). https://doi.org/10.1134/S1064229322602372
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DOI: https://doi.org/10.1134/S1064229322602372