Apr. 3o t 1917 
Fixation of Ammonia in Soils 
H 5 
Table III .—Recovery of ammonia from soils by distilling with potassium hydroxid and 
sodium hydroxid 
Quantity of potassium-hydroxid or sodium- 
hydroxid solution added. 
Nitrogen 
in ammo¬ 
nium 
sulphate 
added per 
100 gm. of 
soil. 
Nitrogen 1 
10N potassium 
hydroxid. , 
recovered. 
10N sodium 
hydroxid. 
C. c. 
Mgm. 
Mgm. 
Per cent. 
Mgm. 
Per cent. 
50. OO 
31. 92 
63. 84 
33* 60 
6j. 20 
50. OO 
34 - 72 
69.44 
36. 96 
73 * 92 
5 . 
50. OO 
34. 66 
69. 32 
36. 12 
72. 24 
10. 
50. 00 
34 - 72 
69. 44 
36. 96 
73 - 92 
20. 
50 . OO 
34 - 72 
69.44 
36. 68 
73 - 36 
30 . 
50. OO 
34 - 44 
68. 88 
37 - 24 
74.48 
40 . 
50. OO 
34.68 
69. 36 
36. 72 
73-44 
80. 
50 . OO 
34 - 44 
68. 88 
34 - 1 6 
68. 32 
50 . OO 
34-48 
68. 96 
34. 60 
69. 20 
Table IV .—Recovery of ammonia from soil by boiling with 10 per cent hydrochloric acid 
Nitro- 
Nitrogen recovered. 
Time of 
boiling. 
gen 
added 
per 
100 
gm. of 
soil. 
Riverside soil. 
Lordsburg soil. 
Ammonium 
sulphate. 
Ammonium 
chlorid. 
Ammonium 
nitrate. 
Ammonium 
sulphate. 
Ammonium 
chlorid. 
Ammonium 
• nitrate. 
Hours. 
1 . 
Mgm . 
50.00 
50.00 
50.00 
50.00 
Mgm. 
32-40 
37 -60 
40.24 
43.20 
P.ct. 
64.80 
75.20 
80.48 
86.40 
Mgm . 
33 -oo 
37-40 
40.00 
43-75 
P.ct. 
66.00 
74.80 
80.09 
87.50 
Mgm • 
32.60 
38.00 
40.80 
44-oo I 
P. ct. 
65- 20 
76.00 
81.60 
88.00 
Mgm. 
P. ct. 
Mgm. 
P.ct. 
Mgm. 
P.ct. 
a. 
3. 
25-50 
51-00 
26.00 
52.00 
25.60 
51.20 
4 . 
36.00 
72.00 
36.40 
72.80 
37 -oo 
74 -oo 
NITROGEN RECOVERED 
The amount of ammonia recovered from soils by leaching with water 
or 10 per cent hydrochloric acid is shown in Table V. 
Table V .—Removal of ammonia from soils by leaching with water or 10 per cent hydro - 
chloric acid 
Quantity of 
percolate. 
Nitrogen 
in am¬ 
monium 
sulphate 
added per 
too gm. of 
soil. 
Riverside soil. 
Lordsburg soil. 
Leached with 
water. 
Leached with 10 per 
cent hydrochloric 
acid. 
Leached with 
water. 
C. c. 
Mgm. 
Mgm. 
Per cent. 
Mgm. 
Per cent. 
Mgm. 
Per cent. 
400. 
50. OO 
II. 42 
22. 84 
25. 80 
5 1 - 60 
4.40 
8.80 
800. 
50. 00 
14. 63 
29. 26 
34*04 
68. 08 
. 5*30 
10. 60 
1,200. 
50. OO 
15 * 54 
31. 08 
37. 68 
75 * 36 
5 - 90 
11. 80 
1,600. 
50. 00 
16. 15 
32 . 30 
39. 06 
78. 12 
6. 50 
13.OO 
2,000. 
50. 00 
16. 39 
32. 78 
40. 06 
80. 12 
6. 90 
13. 80 
2,400. 
50. OO 
16. 50 
33-00 
40. 60 
81. 20 
7. 10 
14. 20 
78373°—17 - 2 
