Content of ¹³⁷Cs and ⁹⁰Sr 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 at 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.