Arrowroot stems and leaves show a considerable amount of activity but the ratio of the activity in the supporting system to that in the
edible part is much less than for coconuts. This is understandable when
the relative amounts of fruit and supporting system in both instances are
considered,
2.2.3
Soil
Exposed soil profile, tube coring, and gross samples were
collected to describe the distribution of activity in the island profiles
and especially in the areas of extensive food plant production.
;
A summary of the beta activity in gross samples of soil is given
in Table 2.3, Table 2.4 presents data obtained from exposed soil profiles. The probability of cross-contamination in these samples was small.
TABLE
2.3
Summary of Beta Activity in Gross Samples of Soil
Beta Activity (PB/min/g)
.
Depth of Soil
«Grol in,
-
lto din.
Likiep
1
90
Utirik
4
960
§50
Rongelap
3
8,900
800
Enjaetok
2
48,000
640
Labaredj
3
85,000
1,300
Kabelle
6
96,000
3,100
Gejen
1
348,060
12,409
Bikar
1
8,400
$0
Eniwetak
1
12,000
240
_—
Island
Number
of Samples
ge
°
we pale ‘.
oh
3 FQ
16