Map of the natural-anthropic background at 1:250,000 scale of the Emilia-Romagna plain - As, Cd, Cr, Cu, Ni, Pb, Sn, V, Zn - 2nd edition

The "Natural-Anthropogenic Background Content Map" represents the area distribution in topsoil (20-30 cm deep) of some potentially toxic metals [As, Cd, Cr, Cu, Ni, pb, Sn, V, Zn] in agricultural soils: this depth is considered representative of the natural-anthropogenic background content (background content according to ISO/DIS 19258, 2005).本数据集为「自然-人为背景含量图（Natural-Anthropogenic Background Content Map）」，旨在表征农田土壤中20~30厘米深度表层土壤内的部分潜在有毒金属的区域分布情况，所涉金属包括砷（As）、镉（Cd）、铬（Cr）、铜（Cu）、镍（Ni）、铅（Pb）、锡（Sn）、钒（V）与锌（Zn）；该土层深度被认定为自然-人为背景含量的代表性表征深度，其背景含量的定义遵循ISO/DIS 19258:2005标准的相关规定。