Methodology for assessing the degree and distribution of salts in the soil for ecological balance, determining its causes and evaluating the appropriateness of related management practices
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Abstract
One of the global problems of the world is the study of factors influencing soil fertility, one of which is salinity. The traditional method for assessing soil salinity in the Eurasian region was analyzed the composition of water extract. In international practice, evaluation criteria for the specific electrical conductivity of leachate from pastes developed by the USDA Salinity Laboratory are widely used. Since the preparation of pastes and extracts from pastes is a laborious process, the electrical conductivity in an aqueous suspension is often measured (1:2.5, 1:5, 1:10). These methods for determining salinity are diversed but their incorrected and gave an erroneous result, which in turn leaded to an inappropriate decision. The conducted research made to create the dataset and analyse the three most common types and degrees of soil salinity: chloride, sulfate-chloride, and chloride-sulfate. The obtained experimental studies proved the possibility of using mathematical models for the actual determination of the salt content when determining the electrical conductivity of the soil solution, namely: for chloride salinization was Y=0.1286x+0.6165 (R2=0.9972); for chloride-sulfate salinization is Y=0.207x+0.5265 (R2=0.9962); for sulfate-chloride salinization is Y=0.1738x+0.7461 (R2=0.9961).
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