Table XII .—Growth of plants in experiment VII 
July 15, 1921 
Assimilation of Nutrient Salts by Corn 
561 
Ratio 
of 
roots 
to 
tops. 
0 \ >0 00 N O' f* VoO 
O' O' M Oi i' ^ n "t 
m h\ 0 to to to 
6 
! Percentage of total | 
roots by weight. | 
I 
C 
flasks. 
ft tj- ft VO 
4 1'- 06 vo 
tO fO ft 
B 
flasks. 1 
1 
j 
00 W CO 00 
w 00 6s 'O 
fO rO 
A 
flasks. 
O V O 'O 
fO V ft 'O 
fO to to V 
Average oven-dry 
weight per root. 
C 
flasks. 
Gm. 
0.0257 
.0132 
. 021 
. Ol88 
B 
flasks. 
Gm. 
0.0248 
. 012 
.0311 
. 0208 
A 
flasks. 
vo 00 *0 
. In ro fO 
^ ri m C4 to 
c 0 0 0 0 
Oven-dry weight 
of roots. 
C 
flasks, j 
WO 'fr to ft I' o> 
.WOW t^o M M ft 
ft W H H M M W 
O 
B 
flasks. 
O' CO t lO'O M 10 to 
. ioI> lo^O HOO ft to 
ft W H ft H H M 
O 
A 
flasks. 
t'- O) OO MD 70 »OCt 
. O t^O O O ft ft 
ft M M * • M W « « 
O 
Number of roots. 
C 
flasks. 
OOO CiH to n 100 
t^'O 10 so t^'O O l— 
B 
flasks. 
>OH M SO 00 sO 
<0 10^0 so iosO 
> 
! 
A 
flasks. 
O' O O'r-O'O >0 't 
vo 
Weight of stalks 
and leaves. 
Aver¬ 
age 
oven- 
dry. 
to to 'T 00 
. H •<* ft* O 
S'© to 4 4 
^ N H 
Oven- 
dry. 
0000 V-M OiO"0 0 
.M0 ''TVp<mp«0' 
S\b in to to't 4 to 
H H *H M 
Green. 
W *tO PO 00 00 O' 
g 06 IfltOklN t' O' 4 
ft NHNttlOtO't't 
(J to to H H W M 
Nutrient solution. 
C flasks. 
Complete (NPK 
present). 
NPK lacking... 
NK lacking (P 
present). 
NK lacking (P 
present). 
B flasks. 
' 
Complete (NPK 
present). 
NPK lacking... 
PK lacking (N 
present). 
NP lacking (K 
present). 
A flasks. 
\Complete(N PK 
/ present). 
|NPK lacking... 
IN lacking (PK 
j present). 
IK lacking (NP 
/ present). 
Plant 
No. 
. . Tf 4 d ffld 0 4 
. O ft to V V 'O'O 
°°^oooooo 
0 0 *-> +-> -M 4 -> *-> 
+J ■*"’ NIO tO H O' 1 - 
H O' H ft tO ^ t tl 
