The distribution of Pu isotopes in three profiles of forest soil in Lublin
region was determined. The retention half-time and migration velocity of Pu
-239,Pu-240 originated from global and Chernobyl fallouts was calculated. T
he average rate of migration of the global fallout plutonium was 0.4 cm/yea
r and that of the Chernobyl one 0.7 cm/year. Good correlation between Pu co
ncentration and organic matter contents was found only in the case of podzo
lic soil profile. In two profiles a good negative correlation between Pu ac
tivity and exchangeable pH of the soil layer was determined.