Accumulation of Arsenic by Plants Growing in the Sites Strongly Contaminated by Historical Mining in the Sudetes Region of Poland.

Correlation coefficients between 1M NH 4 NO 3 -extractable As in soils and As concentrations in plant roots and shoots, determined for the whole collection of samples, were indeed relatively high (R: 0.503 and 0.599, respectively), and highly significant ( Table 3 ).

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