4
of its 13766 content relative to the naturally occurring
OR,
If the 13756 content
in soil is less than 5.2 pCi/em, for example, the 137 C6, content.of the copra
Aa
ag
7%
4 he
yeole
produced may be less than its “OK content, ard |‘oneAabebeerewethat itsparker ~
Lat Ch oe oe
é att Alea ty,
a4: aoecane Pe!Hated ore nett ” C
Nee|
ability should be yeraffected.
A
A
Cs soil concentration’
Table 10 shows the mean
and soil removal actions that may reduce the 13765 concentration in copra to
values equal to and twice that of the natural 40% for all northern islands
(average profile data for PEARL, ALICE, BELLE, and CLARA, plotted in Figs.
8-11 and included in Table 8, were used in the calculations for each of these
islands).
|
On JANET, for example, the commercial agriculture area in its current
condition should yield copra with an average 137 6, 40x concentration ratio of
about three.
Removal of a 6 cm thick layer of soil may reduce this value
to two, and removal of 14 cm may result in copra with equal concentrations
of 13706 and 40.
Note that for islands planned to be used for commercial
agriculture, it is possible that only JANET and PEARL have 13766 soil values
high enough to yield copra with a 13766 4. ratio greater than 2.
Test
plantings of coconut would be needed in areas where removal of soil has
137
been conducted and the level of
Cs in coconut meat analyzed before any
committment is made for planting of
ci
coconut trees in commercial quantities.
pyle”
i,tee
Whth—addi-ttonelseedy it may be. possible to predict witk=eenftdence the
137
level of
Cs in coconut meat through analysis of stems and leaves of
imate trees.
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