lb 
BULLETIN 52, HAWAII EXPERIMENT STATION. 
Table 11. — Comparative weights of rice plants which were grown in manganous 
sulphate and manganese dioxid solutions to which were added various amounts 
of iron as ferrous sulphate. 
Se- 
ries. 
Culture solutions with 
amount of added ma- 
terial per liter. 
Flask 
No. 
Green 
weight 
of 
stalks 
and 
leaves. 
Oven- 
dry 
weight 
Oven- 
dry 
weight 
of 
roots. 
Average oven- 
dry weight. 
1 
of 
stalks 
and 
leaves. 
Stalks 
and 
leaves. 
Whole 
plant. 
Condition of plants. 
A, 
Sol. +0.005 gm. Fe from 
FeSo 4 . 
Sol. +0.005 gm. Fe from 
FeSO 4 +0.4 gm. Mn0 2 . 
Sol. +0.005 gm. Fe from 
FeS O4+O.OI8 gm. Mn 
from MnS0 4 . 
Sol. +0.005 gm. Fe from 
FeSOi+0.4 gm. Mn0 2 ; 
leaves dipped in 0.5 per 
cent FeSO\ solution. 
Sol. +0.010 gm. Fe from 
FeS0 4 . 
Sol. +0.010 gm. Fe from 
FeSO4+0.400gm. Mn0 2 . 
Sol. +0.010 gm. Fe from 
FeSO 4 +0.018 gm. Mn 
from MnS04. 
Sol. +0.010 gm. Fe from 
FeSCn— 0.4 gm. MnG 2 ; 
leaves dipped in 0.5 per 
cent FeS0 4 solution. 
Sol. +0.020 gm. Fe from 
FeS0 4 . 
f ! " 2 
3-4 
I 5-6 
1 7-8 
\ 9-10 
I 11-12 
( 13-14 
\ 15-16 
I 17-18 
I 19-20 
\ 21-22 
Grams. 
15.05 
15. 48 
15. 71 
.29 
.29 
.32 
.67 
.62 
.64 
2.15 
2. 15 
Grams. 
2.41 
2.53 
2.48 
.08 
.07 
.08 
.16 
.14 
.15 
.43 
.42 
.44 
2.56 
2.56 
2.65 
.10 
.10 
.09 
1.28 
1.33 
1.29 
.37 
Grams. 
1.05 
1.07 
1.00 
.06 
.06 
.06 
.06 
.06 
.06 
.17 
.22 
.18 
1.06 
Grams. 
'"2.4 
Grams. 
""%.l\~ 
•Fine; green. 
Leaves white, spot- 
A 2 
1 ted with brown; 
A3 
.08 
.14 
shriveled and 
stunted: dead. 
Light yellowish- 
green, spotted 
with brown; 
A 4 
.15 
.21 
older leaves very 
chlorotic, shriv- 
eled,and stunted. 
Great improve- 
ment over Aa; 
light green: spot- 
ted with dark 
green where iron 
penetrated: few 
brown spots on 
leave?. 
j 23-24 2.17 
15.21 
\ 27-28 15.17 
I 29-30 15.47 
f 31-32 . 32 
.43 
.62 
Bi 
1.07 
/Fine: green. 
1.01 
.06 
.07 
.05 
.39 
.41 
.40 
.13 
. 12 
2.59 
3.64 
(Bleached; spotted 
J with brown; 
B 2 
\ 33-34 
( 35-36 
37-38 
39-40 
41-42 
43-44 
• 45-46 
) 47-48 
1 49-50 
{ 51-52 
I 53-54 
f 55-56 
.35 
.27 
5.91 
5. 95 
6.13 
1. 55 
B 3 
.10 
.16 
slightly better 
I than A 2 . 
1 Light green spotted 
/ with brown; still 
1 stunted. 
| About same as A4; 
> decided improve- 
Bi 
1.30 
1.70 
1. 50 . 37 
1.67 .40 
13.69 2.26 
13. 64 Q . 2i 
.16 
.90 
.99 
.16 
.19 
.38 
.52 
1 ment over B2. 
Ci 

>Fine; green. 
2.25 
2.76 
2.51 
6.93 
6.61 
2.48 
2.63 
2.66 
13.56 
12.78 
13.24 
12.44 
12.45 
12.23 
11.70 
2.51 
.50 
.60 
.56 
.1.43 
1.48 
1.40 
.58 
.62 
- 
2.41 
2.17 
2.30 
2.33 
2.30 
2.30 
1.95 
2.03 
2.06 
1.51 
1.48 
1.41 
1.73 
1.69 
1. 73 
1.38 
1.42 
1.40 
2.33 
3.23 
Somewhatstunted; 
light green spot- 
ted with some 
brown. 
Dark green; infe- 
rior in size to O; 
C 2 
Sol. +0.020 gm. Fe from 1 


C 3 
Fe.^Oi— 0.4 gm. Mn0 2 . 
Sol. +0.020 gm. Fe from 
FeSO 4 +0.018 gm. Mn 
from MnSO*. 
• 
Sol. +0.020 gm. Fe from 
I 59-60 
f 61-62 
\ 63-64 
I 65-66 
) 67-68 
\ 69-70 
} 71-72 
f 73-74 
\ 7.5-76 
I 77-78 
f 79-80 
\ 81-82 
[ 83-84 
f 85-86 
.18 
.41 
.48 
.47 
.20 
.23 
.26 
.55 
.73 
. 
older leaves 
c t 
1.44 
1.89 
shriveled, but 
showed scarcely 
a trace of brown. 
About same as B<; 
dark greei 
where iron 1 ene- 
trated. 
j-i -.-'j;— u.4 gm. mduj; 
leaves dipped in 0.5 per 
cent FeSO* solution. 
'"".hi 
""."84" 
Di Sol. +0.040 gm. Fe from 
.79 
.85 
| 
.70 
.71 
.64 
.58 
.85 
.86 
.84 
.59 
.62 
.62 
>Dark green. 
FeS0 4 . 
2.29 
3.09 I 
Do Sol. +0.040 gm. Fe from 
f Do. 
F^O 4 +0.4 gm. MnG 2 . 
D3 Sol. +0.040 gm. Fe from 
FeSO«+0.018 gm. Mn 
from MnSO«. 
2.31 
3.04 
\ 87-88 12.06 
1 89-90 1 12. 05 
91-92 7. *y 
\ 93-94 
I 95-96 7. 2S 
\ 99-100 9.44 
[101-102 9. 77 
103-104 
•{105-106 7 sa 
\ Do. 
2.01 
2.71 
Ei Sol. +0.080 gm. Fe from 
[ Do. 
FeS0 4 . 
1.47 
2.08 
E- Sol.— 0.080 gm. Fe from 
\ Do. 
F. SO4+O.4 gm. Mn0 2 . 
E Sol.— 0.080 gm. Fe from 
F^n.-Ufimfc ptti \Tn 
1.72 
2.57 
1 Do. 
from MnS04. 
1107-108 
" 
1.40 
2.01 
