MINERALOGICAL COMPOSITION AND SOIL MICROSTRUCTURE OF THE ACCUMULATIVE-DENUDATION LANDSCAPE OF THE NORTHERN PART OF THE FOREST STEPPE AND IN CASE OF MATERIAL EROSION

Abstract

The distribution of clay minerals of the fraction less than 1 micron, extracted from typical, alkaline, podzolized agronomic black earths, depends on the type of soil, lithology of soil-forming rocks and relief. The silt fraction of agrochernozems developed on the quaternary loess-like heavy loam consists of smectite phase, represented by complex disordered mica-smectite formations, di-trioctahedral mica, kaolinite, chlorite. Agroblack soils formed on sediments in which include Neogene eluvium, contain a smectite phase represented by montmorillonite itself and badelyte with clinoptylolites in it. Erosion-resistant the material is represented by rounded aggregates, the structure of which was determined by micromorphological analysis. In the composition of micaceous micaceous fraction, extracted from this material, is dominated by micaceous mectritic formation. The conclusion is made about the demolition of the most valuable fertility of aggregated material - product of interaction smectite phase with organic matter.

Keywords

• erosion
• arable black soil
• mineralogical composition
• soil microstructure
• smectite phase
• aggregates