Assessing the risk of contamination of agroecosystems with heavy metals
The structure of risk estimation for the pollution of agroecosystems with heavy metals and metalloids is presented. The cause-effect relationship between the anthropogenic load and the risk of agrozem pol- lution has been shown. The results of continuous and detailed soil-toxicological survey of the land area reclaimed during at least 160 years are presented. It has been found that the contents of acid-soluble Cu, Zn and Pb in agricultural soils increase by 87, 22 and 19%, respectively, compared to the native soil. It has been revealed that the risk of zinc accumulation in the soil increasesat the application of high rates of organic fertilizers.