RUDN Journal of Agronomy and Animal IndustriesRUDN Journal of Agronomy and Animal Industries2312-797X2312-7988Peoples’ Friendship University of Russia named after Patrice Lumumba1391Petrographic and mineralogical structure of alluvial meadow dark-coloured soils of delta of the river of VolgaKrupnovV AКафедра почвоведения и земледелия; Российский университет дружбы народов; Russian People's Friendship University-Russian People's Friendship University150120101394505092016Copyright © 2010,2010Results of research of petrographic and mineralogical structure of alluvial meadow dark-coloured soils are resulted. Studying soil parts has allowed to receive the qualitative and quantitative characteristic of clay minerals. Their influence on physical properties is established. At an intensive irrigation of cultivated cultures mobili-sation possibilities of K and other biogene elements from soil decrease.alluvial meadow dark-coloured soilspetrographic structuremineralogical structureclay mineralsbiogene elementsаллювиальные луговые темноцветные почвыпетрографический составминералогический составглинистые минералыбиогенные элементы