Map of the natural background at 1:250,000 scale of the Emilia-Romagna plain - Copper [Cu]

It represents the area distribution in the subsoil (90-140 cm deep) of the copper content in soils for agricultural use. This depth is considered representative of the natural background content ('pedo-geochemical content' according to ISO/DIS 19258, 2005). The cartographic units are represented by groups of polygons belonging to concentration classes. Factors that regulate the natural content of metals in soils are: origin of the sediment in which the soil was formed, texture, and evolutionary degree. The copper content does not seem to have a prevailing factor: the spatial distribution of the natural contents of Cu shows a variability weakly consistent with the texture characteristics and the evolutionary degree of the soil while there are no significant differences in the soils in relation to the different origins of the sediment. Concentration values are obtained by the XRF (X-ray Fluorescence Spectrometry) analytical method in order to determine the total content.本数据集表征农用土壤中铜含量在地下90~140厘米深度层的面积分布情况。该深度被认为代表土壤自然背景含量——依据ISO/DIS 19258:2005标准，此背景含量即土壤地球化学背景值（pedo-geochemical content）。制图单元由归属于不同浓度等级的多边形群组构成。调控土壤中金属自然含量的因素包括：成土母质成因、土壤质地以及土壤演化程度。铜含量似乎并无主导影响因素：自然状态下铜的空间分布变异仅与土壤质地特征及土壤演化程度存在弱相关性，且不同成土母质成因对应的土壤铜含量并无显著差异。浓度数值通过X射线荧光光谱法（XRF, X-ray Fluorescence Spectrometry）分析获取，以测定土壤铜的总含量。