44 
Journal of Agricultural Research 
Vol. XI, No. a 
a strong yellow color without precipitate was formed. Where reported 
as “slight” or “trace” only a very light yellow color developed upon the 
addition of the reagent. 
Table I.— Variations in the nitrates and ammonia produced in Oswego silt loam under 
different conditions of incubation 
Juantity 
of soil. 
Nitrogen 
as NO3. 0 
Ammonia 
(NHs). 
Gm. 
50 
Mgm. 
52.8 
Slight. 
iod 
52.8 
Trace. 
So 
48. 4 
Slight. 
100 
52. 8 
Trace. 
200 
54 - 2 
Do. 
So 
50. 4 
Do. 
100 
54 -o 
Do. 
200 
54 - 0 
Do. 
400 
56.9 
Do. 
50 
53-5 
Slight. 
100 
54 - 2 
Trace. 
200 
54 - 2 
Do. 
400 
54-8 
Do. 
800 
55 -° 
Do. 
50 
54-0 
Slight. 
100 
54 - 2 
Trace. 
50 
54-0 
Slight. 
100 
55 -o 
Trace. 
200 
52. 8 
Do. 
So 
44. 9 
Abundant. 
100 
54-2 
Slight. 
200 
53 -o 
Trace. 
200 
53-5 
Do. 
400 
Do. 
400 
54 * 8 
Do. 
400 
52. 8 
Do. 
400 
52. 8 
Do. 
a 100 
19. 0 
Abundant. 
a 100 
52. 8 
Slight. 
a 400 
9. 9 
Abundant. 
a 400 
1.8 
Do. 
a 400 
Trace. 
Do. 
a 400 
Trace. 
Do. 
a 400 
44.0 
Do. 
a 400 
35-2 
Do. 
a 400 
35-2 
Do. 
a 400 
35-2 
Do. 
a IO o 
50. 0 
Slight. 
100 
52.8 
Do. 
IOO 
52. 8 
Do. 
IOO 
52.8 
Trace. 
IOO 
52. 8 
Do. 
IOO 
56.9 
Do. 
200 
55 -o 
Do. 
500 
54 - 2 
Do. 
300 
18. 2 
Abundant. 
300 
18. 2 
Do. 
300 
18. 2 
Do. 
IOO 
55 -o 
Trace. 
Sample 
No. 
Container. 
ioo-c. c. Erlenmeyer flask, cotton-plugged.. 
.do. 
350-c. c. Erlenmeyer flask, cotton-plugged.. 
_do. 
-do.. 
500-c. c. Erlenmeyer flask, cotton-plugged.. 
_do.. 
_do...:. 
....do . 
1,000-c. c. Erlenmeyer flask, cotton-plugged. 
_do. 
_do. 
_do. 
_do. 
100-c. c. bottle, cotton-plugged. 
....do . 
250-c. c. bottle, cotton-plugged. 
_do..... 
_do. 
500-c. c. bottle, cotton-plugged. 
-do. 
-do. 
-do. 
... .do.. 
....do. 
_do... 
....do . 
500-c. c. bottle, cotton-plugged. 
_do. 
....do. 
_do. 
....do. 
....do . 
-do. 
_do. 
_do. 
-do. 
500-c. c. beaker, cotton-plugged. 
500-c. c. beaker, petri-dish cover. 
Tumbler, cotton-plugged.. 
Tumbler, petri-dish cover. 
i-pint fruit jar, cotton-plugged. 
i-pint fruit jar, petri-dish cover. 
_do. 
-do. 
500-c. c. bottle, corked. 
_do. 
....do . 
500-c. c. bottle, petri-dish cover. 
a The figures reported are averages of closely agreeing duplicates. Where duplicates varied widely, they 
are both reported as X and Y. A, B, C, etc., have reference to the depth from which samples were taken for 
analysis. When no letter is given, the whole sample was analyzed or thoroughly mixed and a 100-gm. 
sample taken. A, is in all cases the surface 100 gm.; B, second 100 gm.; C, third 100 gm., etc. 
1.. .. 
2.. .. 
3.. .. 
4.. .. 
5.. .. 
6.. .. 
7.. .. 
8.. .. 
9.. .. 
10. .. 
11.. . 
12.. . 
13.. . 
14.. . 
I 5 - • • 
16.. . 
17.. . 
18.. . 
19.. . 
20.. . 
21.. . 
22A. . 
22B. , 
23A. . 
23B. . 
23C. . 
23D.. 
24X., 
24Y.. 
25XA 
25XB 
25XC 
25XD 
25YA, 
25YB, 
25YC. 
25YD 
26.. .. 
27.. .. 
28.. .. 
29.. .. 
30.. .. 
3 1 *••* 
3 2 •■•• 
33 -.- 
34 A. . 
34B. . 
34 C. . 
35 -*■• 
