AGDELL FIELD EXPERIMENTAL ROTATION SOILS. 
175 
mined ill twelve successive depths of '.» inches each, <>r to a total depth 
of feet. In some otlier casflB the nitric nitrogen was determined 
either in the surface soil or in some of t lie subsoils. The determina- 
tions were made in the sampled taken in the winter of 1883-84, after 
wheat, and the results are given in tlie following table: 
Table 91. — Aydell field > .rperina ntal rotation land—Soil samjdes collected ISS-l- 
54. after wheat — Nitrogen as nitrates (" nitric" nitrogen) in fine dry soil. 
NITRIC NITROGEN. PARTS PER MILLION. 
Depth. 
Unmannred. 
Superphosphate. 
Mixed manure. 
Fed. 
Carted. 
Fed. 
Carted. 
Fed. 
Carted. 
i 
: - 
" i jS 
ijl 
1 
*- » 
: s 
■- -~ 
I || 
| 
- n 
1 
it = 
— ~ 
0* 
" i ~L 
► = 9 
3 
1 
j: z 
15 — 
-I 
- t 
- 
X 
— 
ill 
1.85 
.66 
La 
1.14 
.4-' 
.40 
.19 
.21 
Mi 
1.19 
L07 
1.85 
1.11 
1.44 
1.80 
.67 
.43 
.50 
.61 
.88 
.60 
.67 
.77 
.91 
.32 
1.88 
1.84 
.35 
i:. 
.34 
.24 
.88 
.34 
. 88 
.78 
.59 
1.34 
2.41 
1.90 
-•> 
.'58 
.64 
.32 
.84 
.64 
. its 
.80 
.82 
1.01 
Thir.lU ni' h. s 
Eleventh '.• Inohee 
Twelfth '.t Inobee ... 
0.93 
0.88 
i.m 
0.88 
L88 
0.99 
1.31 
0.73 
NITRIC NITROGEN, POUNDS PER ACRE. 
4.71 
L68 
3.36 
M 
.95 
.90 
.45 
.53 
1.22 
1.49 
2.97 
2.78 
4.81 
3.11 
3.66 
:{. 48 
1 . 51 
.96 
1.18 
L66 
.85 
1.57 
LSI 
8. 00 
2.36 
.90 
3.44 
3.11 
.79 
1.01 
6. 1:5 
4.41 
1.63 
Lao 
Second 9 inches 


Fourth inches 
Fifth 9 inches 
.81 1.52 
Sixth 9 inches 
•«! 
. • ( 
.89 
.65 
2.03 
1.53 
3.75 
.81 
2. SB 
1.68 
2.44 
2.08 
2. 13 
2.83 
i 
1 
Tenth 9 inches 
Twelfth 9 inches 
2.60 
0.81 
3.50 
1.82 
4.45 
2. 77 
3. 67 
2.04 
SUMMARY -NITRIC NITROGEN, POUNDS PER ACRE. 
First to third 'J 
inches 
6.95 
1.88 
5.68 
10.70 
8.65 
3.69 
4.<>9 
5.26 
7. 34 
2.43 
2. 31 
7.31 
12. 17 
3.62 
6.35 
7.04 
Fourth to sixth 9 
inches 

Seventh to ninth 9 
inches 
Tenth to twelfth 
inches 
First to sixth 9 
inches 
8.83 
16.38 
12.34 
9.35 
9.77 
9.62 
15.80 
13.39 

Seventh to twelfth 9 
inches 
First and second 9 
inches . 

6.00 
19.21 
7.14 
14.55 
6. 55 
12.84 
10.54 
18.65 
Third to twelfth 9 
inches 
First to twelfth 9 
inches 
25.21 
21.69 
19.39 
29. 19 
