Analysis by Species.
Because of the incompleteness of
the collections and the great variation within species, it is
not reasonable to attempt to determine whether significant
differences in the amount of activity exist between species.
From the data available,
it appears that bunch grass, Lepturus
repens, had the highest activity of the plants collected at
Rigili and Rojoa after the
shot.
On the other hand, Mycena,
a fungus, was among the highest at Rigili, but lowest at Igurin.
Because of inconsistencies of this nature conclusions as to
species differences are not justifiable.
Analysis by organs.
No specific conclusions can be made
regarding radioactivity in the organs of the land plants collected before and after the Mike shot because of the inconsistencies encountered.
At some collecting areas the roots had
the highest activity, at others the lowest.
leaves were highest.
In general the
An insufficient number of flower and
fruit samples were assayed from the post Mike series to warrant
comparison.
Radiochemical analyses.
Radiochemical analyses of post
Mike soils from Rigili, Rojoa, and Runit and of post Mike plants
from Engebi were made in order to determine the identity and
relative amounts of fission products present.
By comparing
the relative percentages of specific fission products in plants
with those found in the soil, and knowing the solubility of these
fission products in water, it is possible to estimate which tso-
topes have entered the plant via the normal processes of mineral
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