Аннотация:From 1978 to 2021, the migration parameters and dynamics of the 137Cs distribution in arable and virgin soils of Tula oblast were studied. Identical patterns of distribution of 137Cs from global and Chernobyl fallout in the soil profile of leached chernozems were revealed. On arable land, agrotechnical measures contributed to the uniform distribution of 137Cs in the arable soil layer. In virgin horizon soils of chernozem soils of meadow phytocenoses, the processes of redistribution of radionuclides in the surface layers were most active in the first 10-year period after the fallout, which contributed to equalization of the 137Cs content in layers of 0–2 and 2–5 cm and its increase in the 5–10 cm layer to more than 30% by the beginning of 2000. Today, more than 75% of the 137Cs content in virgin chernozem soils of Tula oblast is concentrated in the upper 15 cm layer, and the penetration depth of radionuclides reaches 40–45 cm.
