May 14, 1917 
Soil Nitrogen and Nutrition of Citrus Plants 
199 
Table IX .—Percentage of nitrogen added to soils in dried blood and green manures recov¬ 
ered as ammonia and nitrates after six weeks’ incubation; also percentage gain or loss of 
nitrogen added. November 4, IQ14 
[Results expressed as milligrams of nitrogen per 100 gm. of soil] 
PLOT v 
Material added. 
Nitrogen 
in 
material 
added. 
Nitrogen 
as am¬ 
monia 
recov¬ 
ered in 
6 weeks. 
Percent¬ 
age of 
nitrogen 
as am¬ 
monia 
recov¬ 
ered. 
Nitrogen 
as ni¬ 
trate re¬ 
covered 
in 6 
weeks. 
Percent¬ 
age of 
nitrogen 
as ni¬ 
trate re¬ 
covered. 
Nitrogen 
remain¬ 
ing in 
soil after 
6 weeks. 
Gain or 
loss in 
nitrogen. 
Percent¬ 
age of 
nitrogen 
gained 
or lost. 
Dried blood (1 per 
cent). 
137 - 20 
16.66 
12.14 
49 - 56 
36.12 
112.00 
—25.20 
-18.37 
Sweet, corn (2 per 
cent).’... 
32. 20 
. 00 
.00 
4-34 
13.48 
37 . 8 o 
5.60 
17.39 
Field corn (2 per cent) 
29.40 
.00 
. 00 
4. 76 
16.19 
39- 20 
9- 80 
33 * 33 
Sorghum (2 per cent). 
23. 20 
1.26 
5*43 
.98 
4.22 
36.40 
13* ao 
56.90 
Alfalfa (2 per cent)... 
84.80 
I.40 
1. 65 
28.84 
34- 01 
87 - 55 
2.75 
3*24 
PLOT F 
Dried blood (1 per 
cent)... 
137. 20 
28.98 
21. 12 
2.94 
2.14 
66.00 
—71. 20 
—si. 90 
Sweet corn (2 per 
cent).. 
32. 20 
‘.00 
. OO 
4 - 90 
IS* 22 
32. 20 
.00 
. 00 
Field corn (2 per cent) 
29.40 
2.52 
8- 57 
2.10 
7 -14 
30.80 
1.40 
4 - 73 
Sorghum (2 per cent). 
23. 20 
.14 
. 60 
~ .84 
— 3. 62 
24.15 
•95 
4.09 
Alfalfa (2 per cent)... 
84.80 
4.06 
4 * 79 
11. 62 
13.70 
79 - 50 
~ 5-30 
— 6. 25 
PLOT H 
Dried blood (1 per 
cent). 
Sweet com (2 per 
cent). 
Field corn (2 per cent) 
Sorghum (2 per cent). 
Alfalfa (a per cent)... 
137 - 20 
40 .83 
29.80 
-1.68 
— I. 22 
61.90 
- 75.30 
-54- 88 
32. 20 
.56 
I- 74 
2.38 
7 - 39 
30.45 
— 1-75 
— 5-44 
29.40 
.28 
•95 
X. 12 
3.81 
36.40 
7.00 
23.81 
23. 20 
.28 
1. 21 
—I. 40 
— 6.04 
24. 50 
1.30 
5-60 
84. 80 
3-36 
3 * 96 
13-72 
16.18 
85.10 
•30 
•35 
PLOT B 
Dried blood (1 per 
cent)... 
Sweet corn (2 per 
cent). 
Field corn (2 per cent) 
Sorghum (2 per cent). 
Alfalfa (2 per cent)... 
137- 20 
39.06 
28.47 
0.00 
0. co 
64.90 
—72.30 
-52. 70 
32. 20 
— .70 
-2.18 
3* 7i 
ii- 52 
31- 85 
— -35 
— 1.08 
29.40 
~ .84 
—2.86 
I- 75 
5-95 
29. os 
— • 35 
. — I-19 
23. 20 
- .28 
. —1. 21 
— *77 
— 3.32 
24. is 
•95 
4.09 
84. 80 
3. 22 
3.80 
13- 30 
IS* 68 
79> 50 
“ 5*30 
— 6-25 
PLOT c 
Dried blood (1 per 
cent).. 
137.20 
22.26 
x6.22 
18.68 
13.62 
75 . 6 o 
—61.60 
-44.90 
Sweet com (2 per 
cent). 
32.20 
.00 
.00 
2.59 
8.05 
26.95 
“ 5-25 
—16.31 
Field corn (2 per cent) 
29.40 
— .07 
■ — .24 
.14 
.48 
37* 10 
7. 70 
26.19 
Sorghum (2 per cent). 
23. 20 
.98 
4.22 
-2.38 
—10. 26 
22.40 
— . 80 
“ 3-45 
Alfalfa (2‘per cent)... 
84.80 
2.10 
2.48 
14.28 
16.84 
80.40 
- 4-40 
- 5-19 
plot e 
Dried blood (1 per 
cent). 
137.20 
26.32 
19.18 
16.16 
11. 78 
72. 80 
—64.40 
—46.94 
Sweet com <2 per 
cent). 
32.20 
- .28 
- .87 
—1.40 
— 4-35 
31 * 15 
“ I.05 
“ 3.26 
Field corn (2 per cent) 
29.40 
. 14 
.48 
1. 26 
4. 29 
.36. os 
6.65 
22. 62 
Sorghum (2 per cent). 
23. 20 
- .84 
—3. 62 
—1. 96 
— 8.45 
33 - 6 o 
10. 40 
44.83 
Alfalfa (2 per cent)... 
84.80 
1. 68 
1.98 
14.14 
16. 67 
82. 60 
— 2. 20 
— 2.59 
82981°—17-2 
