1368
MINERAL CYCLING IN A DOUGLAS FIR FOREST STAND
a
pattern of Rb |
tall of 1963 (Fig.
‘The take ds
FOREST
FLOOR
LEACHATES.
6001
SP appeared in
application. Tl
season was abot
season. The upt
———- Ca 45
5004
BNL wie cUtiTe
400
300
ration ta the sei
did ot appear
limiting factoris
soil system, becat
cated a sufficient
]
200)
at that time. 1
_
chemical separat
activity.
| -
-
0
30}
-
SUIL LEACHATES
20!
ro
ae
ae
10
Q
¥
x
we
i
|
oe
"
F
;
C1OX)-
4
i
es
T
Fic. 5. Concentration of radioactivity of Ca in forest floor and surface soil Jeachates.
=
INCHES
a
GM
eet
l
Rb-86
100045
Lg
500,
Q
12000 4
Vic. 6. Uptake patterns by Douglasfir trees of #3;
32
100004
and ™P.
8000,
60004
40004
(10%)
2000Q
T
T
T
T
T
T
T
tT
APR MAY JUN JUL AUG SEP OCT NOV DEC JAN FEB
UNbva.
UNIV. OF
ess(19
p.
-
2, J. S. Oxsox, V
Jj. J. Davis, &
.
May "JUN JUL “AUG "SEP. oct NOV DEC. JAN FEBMAI
MAR’ APR
M
MAY"JUN "JUL "AUG SEP ocTNOV bec JAN FCS
CPM
1. J. D. Ovinerc
,