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The level of contamination by heavy metals and arsenic (As) was estimated in post-agrogenic Retisols, Phaeozems, and Chernozems, belonging to different bioclimatic zones of European Russia. Each chronosequense included arable soil, abandoned soils of different age of restoration and native (forest or steppe) cenosis. The content of organic carbon, total nitrogen, pH value, total amount of heavy metals (Mn, Zn, Cu, Cd, Cr, Ni, Pb, Co), and As were measured in mixed soil samples collected in the former arable horizo...