688 
Journal of Agricultural Research 
Vol. XI, No. 13 
Table VII. —Total carbon evolved as carbon dioxidfront soils in Experiment II 
[Results expressed as pounds of carbon per acre) 
Soil No. 
I, 2 
3*4 
S,6 
7, 8 
9 » 10. 
11, 12 
14.. .. 
16.. .. 
Original. 
Duplicate. 
1, 686 
2,710 
3 , 658 
8,211 
12,483 
4,289 
8,769 
12,703 
1,722 
2 > 744 
3. 6 36 
8, 206 
12,050 
4,357 
Soil No. 
Original. 
18. 
4, 239 
5 , ° 8 * 
4,195 
5,077 
2 , 657 
3,215 
2,688 
20. 
21, 22. 
2 C, 26. 
27, 28. 
20. 
*7. 
- 31 , 32. 
3,245 
o- 1 -, 0 4 . 
Duplicate. 
4, 242 
4 j 989 
2,704 
3,407 
3 > 2 74 
In Table VIII appear the average amounts of carbon evolved as carbon 
dioxid per day in the successive periods. From this table the curves 
appearing in figures 4 to 9 were drawn. 
Table VIII .—Quantity of carbon evolved as carbon dioxid per acre per day in soils of 
Experiment II 
[Results expressed as pounds per acre] 
Soil i 
No. 
ISt 
day. 
2d 
day. 
day. 
4th 
day. 
5 th 
day, 
6th 
day. 
7th 
day. 
8th 
day. 
9th 
day. 
10th 
day. 
11-12 
day. 
13-14 
day. 
15-16 
days. 
17-19 
days. 
20-22 
days. 
i, 2. 
i 
78.5 
87-7 
46.4 
58.1 
43-3 
34 -i 
29-9 
30.4 
26. 7 
25.0 
25.0 
15-3 
15-9 
20.0 
14.6 
3 . 4 . 
277.0 
146.0 
73-4 
90.6 
81.8 
57-3 
50 - 7 
50. 7 
43 -1 
38.4 
37-0 
26.4 
21.4 
29.0 
22. 7 
5 . 6. 
120.0 
137-0 
91.7 
160.0 
129.0 
120.0 
126.0 
113-0 
104.0 
86. 7 
88.5 
56.5 
42. 2 
49-7 
40.0 
7 , 8. 
221.0 
210.0 
202.0 
307.0 
294-0 
247-0 
232.0 
208.0 
200.0 
187.0 
178.0 
120.0 
116. 0 
127.0 
95-0 
9, 10.... 
328.0 
312.0 
303-0 
468.0 
412.0 
338.0 
305 - 0 
289.0 
260.0 
262.0 
239.0 
169.0 
137-0 
177-0 
121.0 
11, 12... 
336-0 
156.0 
135-0 
178.0 
175-0 
149-0 
147-0 
122.0 
119.0 
107. 0 
97 -o 
65-9 
54 -o 
53 -o 
44-0 
13 . • • 
445-0 
256.0 
256.0 
408.0 
383-0 
266.0 
282.0 
265.0 
208.0 
186.0 
193.0 
126.0 
103.0 
129. 0 
90.3 
IS. 16... 
476.0 
345 -o 
335-0 
562.0 
433-0 
375-0 
374-0 
338 *o 
292.0 
272. 0 
237.0 
164.0 
173-0 
15*2- 0 
136-0 
18. 
216. 0 
197.0 
181.0 
232.0 
203.0 
149-0 
143.0 
137*0 
124.0 
114. 0 
101.0 
64.0 
57 - 5 
58.0 
42.3 
20. 
374 -o 
216.0 
197.0 
264.0 
206.0 
204.0 
180.0 
145.0 
148.0 
141.0 
122.0 
100.0 
65-5 
63.0 
47-7 
21, 22. . . 
192.0 
174.0 
191. 0 
266.0 
186.0 
159.0 
149-0 
158.0 
120.0 
108.0 
103.0 
63-5 
52.5 
54 -o 
38.7 
23 , 24 . • • 
373-0 
202. 0 
202.0 
288.0 
275-0 
184.0 
182.0 
195.0. 
141.0 
122.0 
113.0 
71.0 
58.0 
59-3 
43-3 
25, 26. . . 
156.0 
157-0 
125.0 
136*0 
108.0 
72. 2 
63.2 
63-1 
5 i -7 
44.6 
45-3 
30.3 
28.3 
34 - 7 
32 - 7 
27, 28. . . 
325.0 
189.0 
152.0 
152.0 
135-0 
88.4 
91.8 
78.1; 
67.4 
68.7 
a 60.0 
34-2 
30-8 
38- 7 
17-6 
29 . 
149-0 
124.0 
127.0 
184.0 
122.0 
85.0 
72-5 
59.4 
53-9 
42.6 
42.2 
23-1 
22. 7 
27. 2 
18.0 
31 . 32 . . . 
322. 0 
159.0 
177-0 
187.0 
126.0 
105.0 
87.6 
80.9 
77 -? 
58-9 
55 -o 
37-2 
33-3 
33-3 
24.0 
Soil 
23-26 
27-29 
30-33 
34-36 
37-44 
45-51 
52-58 
59-65 
66-72 
73-79 
80-86 
87-93 
94 - 
101— 
108- 
No. 
days. 
days. 
days. 
days. 
days. 
days. 
days. 
days. 
days. 
days. 
days. 
days. 
days. 
days. 
days. 
1, 2. 
10.8 
8.1 
12.0 
8.4 
6.4 
7-9 
5-0 
5 -i 
4.6 
4-3 
4.0 
4-5 
4-7 
4.6 
3-6 
3 , 4 . 
14.6 
11.1 
17.6 
14- 2 
9-3 
12.0 
7-3 
6.4 
66 
5 -i 
5-3 
6.4 
6-3 
6 . 7 
5-2 
5 . 6. 
23.1 
20.4 
29- 8 
22. 2 
16.9 
19.0 
12.3 
ii -5 
9-3 
10.6 
9-7 
7 - 7 
8.5 
9.4 
7-4 
7,8 . 
62.0 
4.8 
72. 2 
54-3 
37-6 
48.6 
37-6 
25 - 7 
3 i -4 
25.1 
23-0 
23-3 
22.0 
21.9 
16.6 
9, 10.... 
86.0 
76-3 
105.0 
84.3 
73 - 5 
97.8 
76.4 
81.4 
61.3 
39-9 
35.0 
33-6 
32-3 
3 2 -4 
24-3 
11, 12. .. 
26.0 
18.8 
30.0 
20. 7 
14. 7 
20.6 
13 * 1 
11.1 
12.3 
9-1 
8.7 
10.6 
9.4 
9.6 
6.4 
13, 14. .. 
68.0 
59 - 7 
73-2 
82.0 
54-6 
56.1 
33-6 
a 23.0 
a 19.7 
a 18. 6 
0 17.0 
a 20.8 
a 15.8 
1 
a 17.6 
a 10.9 
15, 16. .. 
96.0 
65- 7 
TTC. O 
61. 7 
2 
1 J 
18. 
26.0 
20. 2 
49-3 
20. 5 
14-4 
17.0 
16. 7 
9.1 
9. 2 
8.6 
8.6 
8.6 
9-3 
8* 7 
7 -i 
20. 
27. 7 
23-7 
42. 7 
23-9 
18.1 
18.9 
12. 7 
9-6 
10.9 
9.8 
8.7 
11. 2 
10.1 
9.1 
8.1 
21, 22. . . 
25-5 
20.4 
28. 7 
19.9 
14. 0 
18.0 
10.4 
9.4 
9-4 
8.4 
7-9 
9.2 
8.9 
8. 7 
* 7-4 
23, 24 - • ■ 
27.0 
20.6 
42-5 
22. 5 
17.6 
22.0 
12.5 
9 - 7 
11.6 
9.2 
7-7 
10.3 
10.1 
9-9 
7.8 
25, 26. . . 
14. 8 
10.3 
17.0 
11.8 
8.8 
9.8 
6.4 
4-9 
6.8 
5-4 
5-6 
5 -i 
5-6 
5-5 
4.1 
27, 28. . . 
11.8 
14.1 
24.1 
17.8 
“ 11.4 
13 -1 
7-9 
7-3 
7-5 
6. 6 
5-9 
7-7 
9-3 
7-3 
4*5 
29 . 
12.1 
9-5 
29-5 
18. 2 
18.2 
9.1 
12.6 
8.6 
8.4 
5-9 
7-6 
4-5 
5-0 
5-0 
4-5 
31, 32.. . 
19.1 
14.8 
19. 2 
16. 2 
9-2 
18.6 
6.5 
9-3 
6.9 
6.7 
7.2 
8.6 
4-7 
7-9 
5-3 
