BIOGEOCHEMISTRY COPPER (Cu) IN THE SOILS OF THE ZARAFSHAN VALLEY

The consistent pattern and distribution pattern, the issues of biogeochemistry copper and its behavior in different types of soils Zarafshan Valley. The content of copper available to plants depends on the soil-forming rocks, its total content and pH of soil. It is proved that the particle size distribution and K2O content of humus affect the change of available forms of trace element. In Samarkand oasis there is a deficit of available plants in the arable layer of copper on all types and subtypes of soils studied. The meadow-alluvial soils of Bukhara and Karakul oases content available to plants copper is very low in the plow layer.