ABSTRACT
The increase of anthropogenic effect on the biosphere led to the pollution of the atmosphere, water and soil resources by industrial emissions and heavy metals (HM), which are deposited in the soil. Soil is a powerful filter, cleaning biosphere from man-caused substances, and its chemical bar, which usually strongly fixes pollutants. Soil can become the source of secondary pollution as a result of their redistribution and migration by groundwater and surface water streams. The soil toxicity was determined by means of the evaluation of the level of their contamination using plants, capable to absorb heavy metals. These plants we name bioindicators. The conclusion about soil toxicity was done and the measures aimed to decrease it were suggested in dependence on the accumulation of lead, cadmium, copper, zinc, nickel etc. in different phases of plants development in doses exceeding maximum permissible concentrations.
