Ecological-Geochemical Features of the Trace Elements Distribution in Arable Soils and Parent Bedrocks in the Conditions of Slope Relief

The contents of trace elements Mn, Cu, Pb, Zn, Cr, Ba, and Sr in soils and parent bedrocks in the conditions of sloping terrain of the river valley were studied. The comparison of their concentrations with the clarkes of soils and lithosphere, maximum permissible and approximate permissible concentrations, regional background concentration was conducted. The index of total pollution of soils was calculated, the tightness of correlation was defined. The heterogeneity of soil-forming bedrocks and soils in the conditions of slope relief was identified. The content of elements in rocks is low the clarke of the lithosphere (with the exception of Cr). In the soils the accumulation of Cu, Pb, Zn in comparison with clark was revealed, as well as exceeding MPC for Cr. The accumulation of Sr, Pb and C in the arable layer of the soils in comparison with the regional background was found. Topsoil contamination by pollutants is acceptable.