This data set represents the heavy metal concentration measured in the upper soil layer (0-20 cm) on approximately 100 permanent parcels of the National Soil Observation Network (NABO). The data are broken down by elements (cadmium, cobalt, chromium, copper, mercury, nickel, lead, zinc, copper) and by type of land use (large crops, intensive grassland, special crops, etc.). The values, expressed in milligrams per kilogram of dry matter, represent the total content analysed according to the method laid down in the Ordinance on Soil Pollution (Saltric Acid Extraction HNO3 2M).
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