Herman Stanislavovich Kust
Herman S. Kust
Institute of Geography of the Russian Academy of Sciences
ORCID ID: 0000-0003-2022-0142
Scopus ID: 6603566650
ResearcherID: G-3979-2017
Chief Researcher
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Diagnostics of Compaction of Arable Soils in the Transvolga Region in Saratov OblastMoscow University Bulletin. Series 17. Soil science. 2018. 1. p.3-7read more342
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The evidence and factors of the formation of compact horizons in haplic chernozems are discussed. They include a complicated combination of agronomical consolidation, modern solonetzization, and residual alkalinity. It is shown that the combination of physicomechanical and chemical properties (high content of physical clay and clay fraction, low portion of aggregate openness and high interaggregate porosity, the presence of exchangeable sodium in the soil adsorbing complex, alkaline reaction (pH 8.3), mobility of the clay-humus fraction, etc.) favor the formation of overcompacted plow and subplow horizons and their dynamic stability independently of regular mechanical cultivation.
Keywords: degradation of structure, ; subsurface compaction; Sodic features; Haplic Chernozem
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Assessment of the land degradation neutrality in the Samara region by global and regional indicatorsMoscow University Bulletin. Series 17. Soil science. 2023. 3. p.16-27read more309
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Th e assessment of land degradation neutrality (LDN) is used to characterize the achievement of the UN Sustainable
Development Goal 15 (SDG), Target 15.3 — «to combat desertifi cation, restore degraded lands and soils» by
individual countries and regions. Th e article presents the calculation of land degradation neutrality for agricultural
territories of the Samara region using global indicators (dynamics of land productivity, dynamics of land cover,
dynamics of soil organic carbon) and regional ones, such as yield, erosion, content of mobile forms of potassium
and phosphorus in the soil. Th e Trends.Earth tool presented on the QuantumGIS was used to calculate the fi rst
two global indicators platform. Th e evaluation of the remaining indicators was carried out using stock data and
data from the agrochemical service. According to the results land degradation neutrality was not achieved in the
agricultural territories of the Samara region. Th e indicator of SDG 15.3.1 («the proportion of land that is degraded
over total land area») is 78,61%, and the LDN index is –57,22%. Th e main process leading to a negative LDN index
is water erosion, which leads to a decrease in the levels of indicators such as land productivity and humus content.Keywords: land degradation; indicator SDG 15.3.1; land productivity; land cover; soil erosion
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