35
TTT g 1 TT
PT TT TT TT
-——
—™
r—
7
|
—
=
—
30 FE
—
25
a
—_4
J
w 20
—
g
—
~
o
>
_
9
—
& 45
—Y
a
=
—
I
aan
40
—
—
5
—
—
.
5
90°
LE
60°
30°
{f
[|
o°
NORTH
|
|
f {|
30°
\
—
“A
ft tt
60°
90°
SOUTH
Fig. 3— Adjusted soil data: ----- , 1956 soil data; ——, data adjusted to December 1957.
_ Vertical arrows show pot data used for adjustment.
331