Table XVIII. 
43 
-Effect of period of growth of crop on the immediate availability of the 
phosphoric acid in guanos — Continued. 
CORN GROWN 55 DAYS. 
Source of phos- 
phoric acid 
(P«Ob). 
Phos- 
phoric 
acid 
ap- 
plied 
per 
pot. 
Basic fertilizer 
applied per pot. 
Oven-dry yield of individual 
pots. 
Average 
oven-dry 
yield and 
probable 
error. 
Efficiency 
of phos- 
phoric acid 
as com- 
pared with 
that of 
acid phos- 
phate=100. 
No phosphate 
Acid phosphate.. 
Do 
Do 
Do 
Do 
Guano No. 500.... 
Guano No. 503... 
Guano No. 504 
Guano No. 507 
Gm. 
0.30 
.60 
.90 
1.35 
2.03 
2.40 
1.40 
10.00 
3.00 
Sodium nitrate, 
8.4 gm.; am- 
monium chlorid, 
5.3 gm. : potas- 
sium sulphate, 
8 gm.; in two 
applications. 
Gm. 
Gm. 
Gm. 
Gm. 
25 .4 
33.4 
20.8 
20.2 
34.4 
18.6 
29.7 
26.0 
57.1 
37.4 
31.8 
57.0 
43.5 
47.7 
60.2 
46.6 
100.1 
79.7 
87.6 
84.8 
84.7 
83.0 
69.5 
68.2 
104.2 
117.9 
100.3 
108.4 
87.7 
86.4 
99.0 
112.0 
118.6 
146.6 
144.0 
103.5 
121.3 
127.6 
107.7 
130.7 
144.0 
147.4 
167.1 
140. 6 
151.6 
142.6 
145.0 
160.4 
68.0 
82.4 
100.4 
100.0 
68.9 
108.0 
95.7 
85.6 
94.0 
82.8 
125.9 
122.5 
107.6 
122. 6 
105.0 
110.4 
25.0 
35.2 
31.5 
38.5 
30.7 
23.1 
21.8 
14.4 
107.7 
86.5 
105.6 
89.4 
94.2 
107.9 
102.2 
91.0 
Gm. 
24.6 
19.8 
49.0 
29.3 
96.0 
65.4 
102.3 
92.2 
119.3 
126.4 
171.9 
167.6 
114.1 
69.2 
117.0 
100.5 
27.8 
18.5 
95.9 
78.4 
Gm. 
\ 25.3±1.2 
J- 46.0±2.0 
\ 81.9±2.6 
101.0±2.2 
124.6±2.9 
153.8±2.5; 
89.2±3.6 
108. 8 ±2. 9 
26.7±1.6 
96.9±2.1 
MILLET GROWN 13 DAYS. 
No phosphate. . . 
Acid phosphate . 
Do 
Do 
Do 
Do 
Guano No. 499A . 
Guano No. 503 A. 
Guano No. 505A. 
Bone meal 
Guano No. 818. . 
0.30 
.60 
.90 
1.35 
2.03 
3.20 
1.40 
8.00 
3.00 
3.20 
Sodium nitrate, 
8. 4 gm.; ammon- 
ium sulphate, 
6 gm. ; potas- 
sium sulphate, 
8 gm.; in two 
applications. 
( 7.8 
10.6 
10.0 
10.3 
9.0 
19.6 
20.0 
16.6 
19.7 
18.2 
24.5 
26.7 
26.3 
27.6 
23.5 
31.2 
27.3 
30.5 
28.8 
26.9 
30.4 
33.3 
32.8 
32.8 
29.5 
■ 33.6 
36.0 
33.3 
32.8 
27.1 
20.1 
23.8 
24.6 
26.4 
22.4 
27.2 
29.2 
29.8 
31.6 
28.7 
18.4 
17.5 
15.6 
18.0 
15.0 
30.0 
29.0 
28.4 
25 3 
29.8 
{ 28.4 
30.3 
28.1 
29.6 
24.4 
5±0.3 
8± .4 
7± .5 
9± .6 
8± .5 
6±1.0 
5± .7 
3± .5 
9± -5 
5± .6 
2± .7 
28 
MILLET GROWN 41 DAYS. 
No phosphate.... 
Acid phosphate.. 
Do 
Do 
Do 
Do 
Guano No. 499A . 
Guano No. 503A . 
Guano No. 505A . 
Bone meal 
Guano No. 818... 
.30 
.60 
.90 
1.35 
2.03 
3.20 
1.40 
8.00 
3.00 
3.20 
Sodium nitrate, 
8.4 gm.; ammo- 
nium sulphate. 6 
gm.; potassium 
sulphate. 8gm.; 
in two applica- 
tions. 
(22.3 
19.7 
21.0 
18.4 
22.2 
32.9 
33.1 
35.7 
34.9 
34.3 
41.1 
43.0 
44.0 
38.9 
45.8 
47.6 
51.9 
50.3 
56.0 
47.0 
57.1 
61.1 
54.0 
511 
60.7 
{58.1 
62.7 
58.4 
61.3 
52.4 
37.0 
40.0 
41.7 
47.4 
32.3 
43.0 
49.4 
41.9 
53.4 
46.7 
29.3 
31.4 
28.8 
34.4 
52.7 
53.1 
45.2 
53.9 
48.6 
U9.7 
46.8 
48.9 
43.7 
48.4 
7±0.5 
2± .4 
6± .8 
6±1.1 
8±1.3 
6±1.1 
7±1.1 
9±1.4 
0± .8 
7±1.1 
5± .7 
MILLET GROWN 51 DAYS. 
No phosphate.... 
Acid phosphate.. 
Do 
Do 
Do 
Do 
Guano No. 499A . 
Guano No. 503A . 
Guano No. 505A. 
Bone meal 
Guano No. 818... 
.30 
.60 
.90 
135 
2.03 
3.20 
1.40 
8.00 
3.00 
3.20 J 
Sodium nitrate, 
8.4 gm.; ammo- 
nium sulphate. 6 
gm.; potassium 
sulphate, 8gm.; 
in two applica- 
tions. 
(44.2 
34.9 
44.6 
40.2 
42.0 
60.7 
49.4 
55.9 
54.1 
46.1 
63.6 
63.0 
57.5 
62.7 
63.1 
63.2 
63.2 
68.9 
68.1 
61.3 
73.3 
65.9 
69.3 
77.0 
79.1 
^88.0 
78.8 
90.2 
92.5 
79.7 
58.0 
54.8 
58.0 
57.6 
60.0 
65.6 
65.2 
66.9 
66.0 
69.4 
48.2 
44.7 
48.7 
51.9 
50.8 
69.1 
69.0 
73.7 
77.5 
75.0 
[67.1 
65.2 
60.4 
72.0 
69.7 
2±1.1 
2±1.7 
0± .8 
9±1.0 
9±1.6 
8±1.9 
7± .5 
6± .5 
9± .9 
9±1.1 
9±1.3 
