Content of <sup>137</sup>Cs and <sup>90</sup>Sr forms in sod-podzolic soils of Belarus in the long period of the accidents at the Chernobyl NPP

The content of 137Cs and 90Sr forms in sod-podzolic automorphic and semi-hydromorphic (gleamy) soils of different granulometric composition (loamy, sandy loam, sandy) was studied. It was found that during the long post-accident period, a transformation took place in the soils of the forms 137Cs and 90Sr, and a dynamic equilibrium in their content occurred. The content of 137Cs in the form available to plants is currently an insignificant proportion — 5-15%. On the contrary, 90Sr compounds are mainly found in readily available forms, amounting to 60 to 75% in sod-podzolic soils, on average — 67%. This determines its high transitions into plants, especially on mineral soils.