Abstract
This paper discusses the distribution and content of carbonates (CaCO3) in upper horizons of irrigated soils in the Sarpa Hollow of the Caspian Depression on the example of the Duboovrazhnyi irrigated land mass in Volgograd oblast. At the peak of irrigation activities (1985–1990), this area was used to cultivate forage grasses. Sprinkling irrigation techniques were used, the groundwater level remained satisfactory, and no secondary salinization foci were noted. The area currently belongs to a private farm that uses drip irrigation to cultivate cucurbits and vegetable crops. The groundwater level remains satisfactory, and secondary salinization occurs in individual soil horizons. Some fields within the irrigated land mass feature a spotty pattern that can be identified under winter grain crops both in field conditions and on satellite imagery. It is established that the spotty pattern is not related to soil salinization; instead, it is due to differences in the concentrations of carbonates in the surface soil layer. The combined use of remote sensing data and field-survey data collected for areas featuring different degrees of spottiness and spectral brightness in space images makes it possible to distinguish soils with different carbonate concentrations in the arable horizon, which is of utmost importance for their amelioration and reclamation.
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Gorokhova, I.N., Chursin, I.N. Carbonates in Irrigated Soils of the Caspian Depression. Arid Ecosyst 11, 193–199 (2021). https://doi.org/10.1134/S2079096121020062
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DOI: https://doi.org/10.1134/S2079096121020062