Features of the aggregate composition and water stability of chernozems in the south of the Vitim plateau

The article presents a comparative analysis of the structural composition of perma-frost chernozems in the south of the Vitim Plateau, chernozems of the Russian Plain (Lipetsk Oblast) and the Southern Urals (Chelyabinsk Oblast). We have revealed the differences in the structure of these soils: despite the good conditioning during dry sieving, the structure of permafrost chernozems is not water stable. Therefore, the study of meso- and micromorphology of soils in the south of the Vitim Plateau should be continued to clarify their position in the classification.