ON BACKGROUND CONTENT OF SOME MICROELEMENTS (V, Ni, Ti, Sn, Sc, Sr, Zr, Y, Yb) IN SOILS OF UDMURTIA
The article presents the results of a study of the gross content of a number of microelements, including rare rare-earth metals (Sc, Y, Yb), in soils and soil-forming rocks of Udmurtia. For soil-forming rocks of that area, the average accumulation of most elements relative to clarke was noted. The highest concentration was observed for tin, ytterbium, and vanadium (Кк > 2), while dispersion was observed only for strontium. The content of microelements in humus horizons of sod-podzolic soils is lower than in soil-forming rocks. Only zirconium and titanium accumulate slightly (R < 1,3). The upper horizons of gray forest soils, where Zr, Ti, Y, and Sr are accumulated, are richer. In sod-carbonate soils, 6 out of 9 elements are accumulated.