Department Bulletin 1430 
PLATE IV 
Z£%z 
.5 £ ® 
Es ~ c£ 
oS3.. 
_J 
o 
CO 
soil, sh 
n erosii 
with h 
makes 
UJ 
©S^.2 
X 
H 
«.§|P 
o 
«"^^ 
z 
o O c| 2 
®2 § 3 
Q 
£oo^ 
z 
m &X1 m 
CO 
forei 
soil 
root 
co 
UJ 
-s^s 
UJ 
» Sw-g, 
en 
sot; mo 
h 
root] 
ds th 
il an 
wher 
eat d 
Ll 
O 
^.Sg„fci 
co 
I- 
O 
O 
oots 
work 
es th 
uedu 
le to 
C£ 
TfBSPg 
i^5 
•^ S 3 
es S3 a 
'4V 
cU 
" a >: 
CO 
£ "S 
Q 
o 3 
o 
P3 o 
o 
2,0 
£ 
0.3 
>■ 
<i)73 
02 
"d 3 
on 
Q 
O 3J 
UJ 
5 K 
* 
c 
o 
CQ 
LU 
I 
a 
O 
^ 
B.2 
z 
.9 "5j 
o 
Tl O 
co 
^T3 
o 
X o 
cc 
0)_y 
111 
>a ° 
~Ji 
3 
tc^ 
g2 
o c 
o o 
A*~ 
**/ • *»< . 
'* «; - . *°k^ 
