152 
Journal of Agricultural Research 
Vol. IX, No. 5 
Table XV. —Effect of adding sodium salts on the fixation of ammonia by a soil from 
Riverside , Cal. 
Nitro¬ 
gen in 
Nitrogen recovered. 
Time sodium 
salt was allowed 
to stand before 
the addition of 
ammonia. 
Quantity and 
strength of 
sodium salt 
added. 
ammo¬ 
nium 
sulphate 
added 
per 100 
gm. of 
soil. 
Sodium sul¬ 
phate. 
Sodium chlorid. 
Sodium nitrate. 
Hours. 
xo c. c. Nji.. 
Mgm. 
Mgm. 
Per cent. 
Mgm. 
Per cent. 
Mgm. 
Per cent. 
X. 
50. 00 
27. 24 
54 . 48 
27. 16 
54 - 32 
27. 46 
54 . 92 
X. 
IO C. C. N/ 2 . . 
50. 00 
27. IO 
54 . 20 
27. 20 
54 - 40 
27. 26 
54 - 52 
X. 
XO C, C. NI4. . 
50. 00 
27. IO 
54. 20 
27. l6 
54 - 32 
27. 16 
54 - 32 
x. 
10 c. c. N/8 .. 
50. 00 
27.30 
54. 60 
27. 24 
54-48 
27. 06 
54.12 
K .. 
IO C. C; N/l6. 
.50. OO 
27 - IS 
54 . 30 
27.36 
54-72 
27. 20 
54.40 
x. 
IO C. C. NI32. 
50.00 
27. 20 
54 - 40 
27. l6 
54-32 
27. l6 
54-32 
24. 
24. 
10 c. c. N/i .. 
IO C. C. N/2. . 
50. OO 
50.00 
26. 80 
26. OO 
53* 60 
52. 00 
26. 76 
26. 76 
53 - 52 
53 - 52 
26. IO 
26 . OO 
52. 20 
52. 00 
24. 
10 c. c. N/d.. 
50. OO 
26. 75 
S 3 - 50 
26. 76 
53 - 52 
26. 80 
53 - 6 ° 
24. 
10 c. c. N/8. . 
50.00 
26. 90 
53- 80 
26. 48 
52. 96 
26. 90 
53 - 8 o 
24.. 
ioc. c. N/i6. 
50. OO 
26. OO 
52. 00 
26.34 
52.68 
26.75 
53 - 5 ° 
24. 
10 c. c. NI32. 
50.00 
26.85 
53 - 70 
26. 20 
52.40 
26. 90 
53 -80 
Table XVI. —Effect of adding magnesium salts on the fixation of ammonia in a soil 
from Riverside , Cal. 
Time magnesium 
salt was allowed 
to stand before 
the addition of 
ammonia. 
Quantity and 
strength of 
magnesium salt 
added. 
Nitro¬ 
gen in 
ammo¬ 
nium 
sulphate 
added 
per 100 
gm. of 
soil. 
Nitrogen recovered. 
Magnesium 
sulphate. 
Magnesium 
chlorid. 
Magnesium 
nitrate. 
Hour. 
Mgm. 
Mgm. 
Per cent. 
Mgm. 
Per cent. 
Mgm. 
Percent. 
x. 
10 C. C. N/2. . 
50. OO 
26. 88 
53- 76 
26. 74 
53-48 
26. 88 
53 - 7<5 
y . 
10 c. c. NU. . 
50. OO 
26. 70 
53 - 4 ° 
26. 70 
53 - 4 ° 
27. 00 
54-00 
X. 
10 c. c. N/8.. 
50. 00 
26. 60 
53 - 20 
26. 60 
53 - 20 
26. 70 
53 * 40 
X. 
ioc. c. N/16. 
50. OO 
26. 40 
52. 80 
26. 80 
53- 60 
26. 60 
S3" 20 
X . 
IO C. C. NI32. 
50.00 
26. 32 
52. 64 
26. 60 
53- 20 
26. 80 
53.60 
Table XVII .—Effect of adding calcium salts on the fixation of ammonia by a soil from 
Riverside , Cal. 
Time calcium salt 
was allowed to 
stand before the 
addition of 
ammonia. 
Quantity and 
strength of 
calcium salt 
added. 
Nitro¬ 
gen in 
ammo¬ 
nium 
sulphate 
added 
per 100 
gm. of 
soil. 
Nitrogen recovered. 
Calcium sul¬ 
phate. 
Calcium chlorid. 
Calcium nitrate. 
Hour. 
Mgm. 
Mgm. 
Per cent. 
Mgm. 
Per cent. 
Mgm. 
Per cent. 
H . 
10 c. c. Nji.. 
50. OO 
26. 70 
53 * 40 
26. 60 
53 * 20 
26. 80 
53- 60 
H . 
IO C. C. N/2. . 
50.00 
26. 80 
53 -60 
26. 32 
52. 64 
27. 16 
54 - 32 
K . 
10 c. c. N/4. . 
50. OO 
26. 80 
53 - 6° 
26. 40 
53- 80 
26. 70 
53 * 5 ° 
y . 
10 c. c. N/8. . 
50. OO 
26. 50 
53 - 00 
26. 70 
53 * 40 
26. 60 
53* 20 
K . 
10 c. c. Nji6. 
50. OO 
26. 40 
52. 80 
26. 50 
53* 00 
26. 40 
52. 80 
y . 
10 c. c. N/32. 
50.00 
26. 60 
53- 20 
26. 40 
52. 80 
26. 30 
52. 60 
