MOBILE POTASSIUM OF SOIL AND137Cs ACCUMULATION BY AGRICULTURAL CROPS

Abstract

In field experiments conducted on sod-podzolic loamy sand soil, close negative correlations between the content of mobile potassium in the soil and the accumulation of¹³⁷Cs by plants were found. The efficiency of saturation of the soil potassium in the discrimination of¹³⁷Cs is much higher on soils with low potassium content. The minimum biological availability of radio caesium is observed for spring wheat and barley in the range of 413-419 ppm, spring rape - at 454 ppm, potatoes - at 465, corn - at 432 ppm, timothy grass - at 412 ppm, clover - 506 ppm, alfalfa - 437 ppm and arctic clover - at 327 ppm of mobile K₂O content in the soil.