23 
Absorption of calcium and potassium phosphate in solutions of fertilizer mixtures. 
[Expressed in parts per million of PO< in the percolate.] 
Percolates of 100 cc. 
100.. 
200.. 
300.. 
500.. 
700.. 
900.. 
1,100 
1,300. 
1,500. 
1,700. 
1,900. 
2,100. 
Soil No. 517. 
Ammonium sulphate, po- 
tassium phosphate, and 
potassium sulphate. 
Untreat- 
ed. 
Heated, j 
Trace. 
46 
86 
34 
140 
22 
200 
70 
480 
360 
168 
Trace. 
480 
420 
480 
460 
540 
540 
480 
500 
580 
640 
560 
560 
form. 
26 
34 
100 
240 
460 
200 
540 
540 
680 
500 
640 
660 
Ammonium sulphate, cal- 
cium phosphate, and 
potassium sulphate. 
Sodium nitrate, calcium 
phosphate, and potas- 
sium sulphate. 
Untreat- 
ed. 
Heated. 
26 
38 
50 
120 
392 
512 
550 
650 
1,700 
1,550 
1,600 
1,700 
1,750 
1,750 
1,600 
1,650 
1,700 
1,750 
1,500 
1,800 
1,950 
1,950 
1,950 
2,000 
Chloro- 
form. 
Untreat 
ed. 
44 
380 
448 i 
700 
1,750 : 
1,650 
2,000 
1,850 
1,750 
1,700 
2,000 
2,000 
224 
360 
232 
600 
1,050 
1,400 
1,400 
1,350 
1,250 
1,500 
Heated. 
50 
56 
328 
550 
1,050 
1,350 
1,050 
1,100 
1,500 
1,150 
Chloro- 
form. 
280 
400 
256 
750 
1,050 
1,350 
1,450 
1,400 
1,550 
1,150 
SUMMARY. 
P0 4 added to 100 
grams soil, grams. 
POi fixed by 100 
grams soil, grams. 
Per cent of PO* fixed 
1.5750 
1.5750 
1.5750 
4.3050 
4.3050 
4.3050 
2.8050 
2.8050 
.7588 
48.2 
.8548 
54.3 
.6670 
42.3 
1. 3982 
32.5 
1.2780 
29.7 
1.0678 
24.7 
1.6134 
57.3 
1.2116 
43.2 
2.8050 
1.5014 
53. 5 
Soil No. 428. 
Percolates of 100 cc. 
100.. 
200.. 
300.. 
500.. 
700.. 
900.. 
1,100 
1,300 
1,500 
1,700 
1,900 
2,100 
Ammonium sulphate, po- 
tassium phosphate, and 
potassium sulphate. 
Untreat- 
ed. 
Trace. 
16 
16 
12 
33 
19 
19 
18 
7 
11 
22 
31 
20 
13 
13 
12 
16 
9 
90 
236 
236 
264 
240 
320 
Chloro- 
form. 
Trace. 
20 
20 
12 
15 
14 
19 
20 
6 
21 
21 
16 
Ammonium sulphate, cal- 
cium phosphate, and 
potassium sulphate. 
Untreat- 
ed. 
Heated. 
19 
15 
16 
15 
16 
15 
11 
10 
16 
8 
21 
36 
6 
6 
8 
19 
6 
15 
9 
33 
17 
36 
13 
70 
Chloro- 
form. 
Trace. 
15 
15 
11 
15 
Sodium nitrate, calcium 
phosphate, and potas- 
sium sulphate. 
Untreat- 
ed. 
Heated. 
Chloro- 
form. 
SUMMARY. 
P0 4 added to 100 
grams soil, grams. 
P0 4 fixed bv 100 
1.4700 
1.4700 
1.4700 
0. 8265 
0.8265 
0.8265 
0.6375 
0.6375 
0.6375 
grams soil, grams. 
Per cent of PO< fixed 
1.4296 
1. 1104 
1.4298 
.7995 
. 7754 
.8033 
.61.78 
.6191 
.6161 
97.1 
75.5 
97.1 
9R.8 
93.9 
97.3 
96.9 
97.3 
96.7 
