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Averaged assessments of radiological effectiveness dynamics of mineral fertilizers of long-term application at the late phase of ChNPP accident have been carried out on the base of 3-5-years experiments. The influence of mineral fertilizers, used in different doses for agricultural plants, has been shown for intensity of 137Cs accumu-lation by plants on various soil-climatic conditions of radioactively contaminated territory of the Ukraine.

Results of the study of 90Sr and 137Cs migration mobility in soils characterized with contrasting physical-chemical properties and granulometric composition has been analyzed. The mentioned radionuclides were intro-duced in soils in initial water-soluble form. Ecological and effective half-time of cleaning of soils 20-cm hori-zons (Tecol) has estimated. Mean values of Tecol 90Sr varies in limits 3.7 - 84 years. Tecol 137Cs varies in limits 61 - 265 years. Correlation of ecological half-time cleaning of soddy-podsolic soils species from radionuclide and physical-chemical properties and granulometric composition of these ones has been analyzed, strong correlation of Tecol 90Sr as well, as mean correlation of Tecol137Cs with mentioned soils characteristics has been noted.