Mn, Pb, and Zn Componds in Gray Forest Soils of the Central Russian Upland

摘要

The studies of the fractional composition of gray forest soils by the Tessier method showed that, in unpolluted soils, irrespectively of the land use, Mn is mainly accumulated in Fe and Mn hydroxides, Zn is accumulated in the components of the residual fraction represented by primary and clay minerals, and lead is accumulated in Fe and Mn hydroxides and in the residual fraction represented by primary and clay minerals, and lead is accu-mulated in Fe and Mn hydroxides and in the residual fraction. Trends in the changes in the fractional composition of heavy metals in agricultural soils are considered.