26 
ABSORPTION OF NITROGEN. 
AMMONIUM SULPHATE. 
The following table shows the results obtained by the application 
of ammonium sulphate in mixtures: 
Absorption of nitrogen from a solution of ammonium sulphate in a mixed fertilizer. 
[Expressed in parts per million nitrogen in the percolate.] 
Soil No. 517. 
Percolates of 100 cc. each. 
Ammonium sulphate, po- 
tassium phosphate, and 
potassium sulphate. 
Ammonium sulphate, cal- 
cium phosphate, and 
potassium sulphate. 
Un- 
treated. 
Heated. 
Chloro- 
form. 
Un- 
treated. 
Heated. 
Chloro- 
form. 
100 
81,5 
128.8 
99 
130 
131 
137 
149 
178 
178 
172 
188.4 
148.6 
138 
133 
130 
174 
141 
166 
178 
172 
88.9 
64.9 
125.4 
135 
148 
168 
156 
153 
175 
159 
172 
133.9 
167.2 
114 
143 
128 
159 
151 
170 
159 
172 
91.3 
200 
168.7 
30 
111 
128 
129 
136 
151 
178 
178 
172 
114 
500 
153 
700 
136 
900 
156 
1,100 
164 
1,300 
163 
1,500 
172 
1,700 
172 
1,900 
SUMMARY. 
Nitrogen added to 100 grams soil gram . 
Nitrogen fixed by 100 grams soil do . . . 
Per cent of nitrogen fixed 

1892 
0. 1892 
0. 1892 
0. 1892 
0. 1892 
0342 
.0152 
.0350 
.0268 
.0194 
IS 
1 
8.03 
18.5 
14.2 
10.2 
0. 1892 
.0231 
12.2 
SoU No. 428. 
Percolates of 100 cc. each. 
Ammonium sulphate, po- 
tassium phosphate, and 
potassium sulphate. 
Ammonium sulphate, cal- 
cium phosphate, and 
potassium sulphate. 
Un- 
treated. 
Heated. 
Chloro- 
form. 
Un- 
treated. 
Heated. 
Chloro- 
form. 
100 
66.2 
88.2 
89 
109 
120 
103 
90 
118 
147 
147 
172 
154.5 
116.9 
112 
109 
136 
116 
139 
157 
172 
172 
187 
44.9 
103.6 
93 
103 
107 
110 
114 
147 
159 
147 
172 
86.1 
108 
110 
123 
118 
149 
148 
176 
187 
172 
187 
140.7 
.128 
122 
154 
133 
146 
134 
162 
172 
172 
187 
81.5 
200 
112 
300 
107 
500 
116 
700 
112 
900 
122 
1,100 ... 
144 
1,300 
145 
1,500 
178 
1,700 
172 
1,900 
187 
SUMMARY. 
Nitrogen added to 100 grams soil. 
Nitrogen fixed by 100 grams soil. 
Per cent of nitrogen fixed 
.do. 
0. 2064 
0.2064 
0. 2064 
0. 2064 
0.2064 
.0668 
.0322 
.0618 
.0358 
.0257 
32.4 
15.6 
29.9 
17.3 
12. 6 
0.2064 
. 0437 
21.2 
