“…Results from this study and from the work of other investigators (Kimber andBooth 1958, Bormann, Shafer andMulcahy 1958) indicate that the major source of fission products entering the food chain from atmospheric fallout is from the fallout particles intercepted by plant foliage. Under certain other conditions of environmental contamination, plant roots might be the major pathway through which soluble fission products enter the food chain.…”