Investigations on the Plant Uptake of Fission Products from Contaminated Soils II. The Uptake of Radioactive Strontium Placed at Different Depths in the Soils

摘要

he possibility of reducing the plant accumulation of Sr-90 by deep ploughing of the contaminated soil was investigated in experiments with dif¬ferent crops grown in microplots. The Sr-90 was placed at different levels in the soil profile, and the uptake by barley, rye-grass, red clover, and root crops was measured. As compared with superficial application, place¬ment of the strontium at a depth of 40-45 cm reduced the Sr-90 content of the crops by a factor of 2 to 5 according to the soil type.