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Soil contamination is one of the most serious environmental problems. The aim of this study was to assess the level of contamination of soil by hazardous metals in 5 regions of Slovakia. Overall 152 samples (soil + plant) were collected from 76 sampling sites in investigated regions. In all samples contents of Zn, Cu, Ni, Pb and Cd were determined. In soil samples the total contents of risky elements in extracts by aqua regia as well as contents of bioavailable forms in extracts by NH4NO3 (c=1 mol/L) were determin...