THE VARIABILITY ASSESSMENT OF THE IMPACT OF SOIL POLLUTION LEVELS, APPLICATION OF MINERAL FERTILIZERS, AMELIORANTS AND CALCIUM-CONTAINING INDUSTRIAL WASTES ON ACCUMULATION OF 137CS AND 90SR IN CROPS

The data on the content of 137Cs in soils of agricultural lands of the RF subjects subjected to radioactive contamination from the Chernobyl accident are presented. After 30 years, there remains a strong irregularity of radioactive contamination of the soil. The highest levels of contamination observed in Bryansk (average of 1.87 Ku/km2 , a standard deviation of 3.1 Кu/km2 ) and Tula (average of 1.0 Ku/km2 , a standard deviation of 0.8 Ku/km2 ) areas. The correlation between the area and the average density of soil contamination (R= 0.77) was noted. The analysis of the results of local soil monitoring revealed that the relative contribution of 137Cs soil pollution level to the variability of its content in plant products averaged over crops is 56 ± 8 %, environmental factors and economic activity – 44 ± 8 %.