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The Use of the Soil-Geomorphological Database for Studying the Spatial Variability of the Humus Content, Physical Clay, and Clay in the Soils of the Kuznetsk–Salair Geomorphological Province


Based on archival data on the soils of the Kuznetsk–Salair geomorphological province (within Novosibirsk oblast) and the results of processing digital elevation models, a soil-geomorphological database (SGDB) has been developed for collecting, storing, and processing spatially distributed information. The SGDB consists of tables and related vector and raster cartographic data with information on the chemical and physical properties of soil horizons, morphometric characteristics of topography (height, steepness, topographic wetness index, risk factor for the development of erosion, stream power index, terrain ruggedness index, topographic position index, etc.). The following soils are widespread in the study area: leached chernozems (Luvic Chernozems) and podzolized chernozems (Luvic Greyzemic Chernozems); ordinary meadow-chernozemic soils (Gleyic Chernozems) and podzolized meadow-chernozemic soils (Greyzemic Gleyic Chernozems); podzolized light gray, gray and dark gray forest soils (Luvic Greyzemic Phaeozems); calcareous meadow soils (Eutric Gleysols); podzolized meadow soils (Haplic Gleysols); solonchakous meadow soils (Haplic Gleysols (Protosalic)); meadow alluvial soils (Eutric Fluvisols); and meadow solonetzes (Gleyic Solonetzes). The analysis of the created maps made it possible to identify a trend of an increase in the humus content, physical clay, and clay in the upper soil horizon from the northeast to the southwest of the study area. A similar trend was noted for the topographic wetness index. The opposite trend was detected for the content of physical clay and clay in the parent rock, i.e., an increase in the content of physical clay and clay from the southwest to the northeast. It was found that the soils in river valleys and on plains are characterized by higher contents of humus, physical clay, and clay in comparison with the soils of the upper parts of slopes and tops of local hills. No significant correlations were found between the morphometric parameters of the relief and the contents of humus, physical clay, and clay in the topsoil horizons and parent rocks.

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The author is grateful to O.A. Savenkov for his help in collecting archival materials at the initial stage of this study.


This study was performed in agreement with the state assignment of the Institute of Soil Science and Agricultural Chemistry, Siberian Branch of the Russian Academy of Sciences, with financial support from the Ministry of Science and Higher Education of the Russian Federation.

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Correspondence to N. V. Gopp.

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Translated by D. Konyushkov

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Gopp, N.V. The Use of the Soil-Geomorphological Database for Studying the Spatial Variability of the Humus Content, Physical Clay, and Clay in the Soils of the Kuznetsk–Salair Geomorphological Province. Eurasian Soil Sc. 54, 986–998 (2021).

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  • morphometric parameters of the relief
  • mapping
  • LS-factor
  • SPI
  • TWI
  • TRI
  • TPI
  • SRTM
  • DEM