Radioactivity distribution of the fruit trees ascribable to radioactive fall out (6). Effect of heterogeneity of caesium-137 concentration in soil on transferability to grape trees and fig trees

We examined the effects of the heterogeneity of 137Cs concentration in soil on transferability to shallow rooted fig and non-shallow rooted grapes. Three-year-old trees were planted into the pots filled with soil changed to the concentration of radioactivity Cs in surface (0 - 5cm) and deep soil (5 - 15cm). Transfer rate of radioactive 137Cs to plants from the soil was higher in fig than in grapes when grown under the same conditions. In fig trees, transfer rate of radioactive 137Cs to plants from the soil was higher the plants cultivated under high concentration of 137Cs in surface soil than in deep soil. (author)