[Dynamics of decrease of the transfer coefficient of Cs-137 to agricultural plants after the Chernobyl AES accident].

Data on the dynamics of the decrease of 137Cs transfer factors to agricultural plants after the accident at the ChNPP are presented. The ecological half-life periods of decrease in transfer factors in the first period after the accident (1987-1989) have been shown to vary between 1.2 and 2.9 years. Subsequently the decrease slowed down and in 1990-1994 the half-life periods amounted to 4-11 years depending on plant species peculiarities and soil properties.