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Accumulation of Pb, Cu, and Zn in native plants . While total soil Pb, Cu and Zn concentrations varied from 1,239 to 4,311, 36 to 1,020 and 240 to 2,380 mg/kg, those in the plant shoots ranged from 63 to 2,029, 20 to 570, and 36 to 690 mg/kg