Dependence of the resistance of light chestnut soil to water and wind erosion on its structural coefficient

Abstract

Introduction. In recent years, the science of agriculture has been paying great attention to the preservation of soil fertility and the selection of new territories for their introduction into crop rotations. The first step to this is to study the structural condition of soils. There is a tendency to decrease fertility and deterioration of the structural and aggregate composition of the soil cover of agricultural soils. Object. The object of the study was an intensive level 2 test site of the Kamyshin type, located in the Manychsko-Don province of the dry steppe zone on the Volga upland within the boundaries of the Nizhnevolzhskaya tree species breeding station in the Kamyshinsky district of the Volgograd region Materials and methods. The dividing parts of the catchments of the Kirpichny sukhodola, which flows into the Kamyshinka River and into the Kamyshinsky Bay, as well as the Belenky sukhodola, which flows into the Volga River, were studied. The landscape area is the Ilovlinsky-Volzhsky stratified table-step strongly dissected by a ravinegirder network. The total land area of the Nizhnevolzhskaya station is 664 hectares, including the area of 4 plots with massive forest plantations and linear erosion control plantings is 646 hectares. Results and conclusions. The structural coefficient was calculated using the formula: Kstr=(∑(10-0.25mm))/(∑(>10mm,<0.25mm)) and based on it, the soil was characterized according to the following gradation: >1.5 – excellent aggregate condition; 1.5-0.67 – good; <0.67 – unsatisfactory. The proportion of agronomically valuable aggregates in the studied samples was determined. Aggregates exceeding the range in size were classified as agronomically inferior.