PLATE III. GRAPHIC REPRESENTATION OF THE PERCENTAGE OF POSITIVELY REACTING COLORADO AND FOREIGN SOILS 
THAT MADE THEIR FIRST, SECOND AND THIRD LARGEST GAINS IN NITRIC NITROGEN FROM THE DIFFERENT NITRIFIABLE 
SUBSTANCES. 
* 
o 
VO 
o 
to 
o 
o 
co 
o 
CM 
o 
o 
CTj 
bo 
O) 
<D 
bo 
u 
cS 
c 
5 
bo 
(S) 
<v 
bo 
u 
OJ 
T 3 
C 
o 
o 
V 
w. 
a 
bo 
03 
<u 
bo 
03 
u 
s 
o 
vO 
o 
o 
co 
o 
CM 
o 
c n 
£ 
03 
0) 
o ™ & 
o 
Mh T3 C! 
bo 
T3 O O 
o U 
o 
3 i 
<u 
o 
o 
Cl 
X 
£ 
o 
in 
c 
in 
O 
o 
