6 em ele prediction of concentrations in fruit papaya > Pandanus and banana > Nesser- of one species from those in fruit or sehintdta and leaves of another species. (Tables 15 and 18). These ratios show that distribution patterns eaevola > coconut These results 1 for each nuclide are consistent within agree with those of Welander. . 7 a particular species. various species differs slightly from However, The relative uptake of we _ of must remember that the importance of that the contribution of each nuclide Leaves, the internal dose to to man varies with 906 For 137 Cs Cs by the . in mature the concentration appears to decrease with Pandanus > Seaevola > different species. Messerschmidta, coconut, and papaya > The fruit-fruit and fruit-leaf breadfruit > banana. A comparison of concentration ratios are calculated 37 o, uptake by fruit yields from a comparison of pattern: the concentration factors of three plant groups (plants the papaya > FPandanus and breadfruit > coconut (Tables 16 and within each group were sampled from 19). the same general location) and from 239,240), | by mature leaves are much comparisons of more limited the median concentra- The data tor the uptake of than data for 706). and tion ratios of all associated plant- IS To, but preliminary results sug- soil samples (Table 14). gest: Messersemntdia > breadfruit > Analysis of the concentration ratios for mature leaves and fruit suggests Pandanus and coconut > papaya > ~ that some Seaevola and banana {see Table 17). species concentrate a given nuclide Although no concentration ratios are to a much greater extent calculated, others (Tables 315-19). than do For I06,. the uptake of 90. Sr and 137 tae . ~ Cs by unfertilized summer squash in mature leaves, the concentration de- exceeds that of all other edible creases order: plants sampled. in the breadfruit and Summary and Conclusions The radionuclide concentration in the concentration at depths as great surface sotl samples (0 to 15 cm) as 120 em excecds that in the top varies greatly throughout both Bikini 2.5 em.) and ability in surface soil concentrations Eneu Yslands. In addition to the As a result of the vari- inhomogeneity observed in surface with lecation and with depth, soil concentrations, sions regarding dose reduction via indicate that tration as a profile data radionuclide concen- soil function of soil depth is guite variable. ereat (In some cases, Ms removal must care. It is conclu- be exercised with nearly impossible to generalize about remedial measures —-31-