68o 
Journal of Agricultural Research 
Vol. XI, No. 13 
In Table II are found the number of pounds of carbon per acre given 
per day for the various periods. These were taken from the total carbon 
dioxid given off in the various periods. The data appearing in this table 
were used in plotting the curves of figures 1,2, and 3. 
TablF II .—Amount of carbon evolved as carbon dioxid per day from soils in Experiment I 
[Results expressed as pounds of carbon per acre per day] 
Soil 
Day. 
No. 
1 
2 
3-4 
5-8 
9-11 
12-15 
16-18 
19-22 
23-25 
26-32 
33-39 
40-46 
47-53 
X, 2. 
57-o 
51.0 
33-3 
18.3 
12.3 
12.4 
12.7 
n*5 
7.0 
9.8 
013.6 
13*1 
10.6 
3,4. 
240. 0 
128.0 
54-0 
35* 3 
22.3 
20.3 
20. 7 
18.5 
XI. 1 
14.4 
021. 0 
17-1 
12.5 
5,6. 
81. 2 
78. 0 
47.6 
25.O 
17. 2 
17- 7 
18.8 
16.4 
10.4 
I3*i 
019-4 
14.0 
16.4 
7,8.. ... 
263. 0 
134-0 
67-5 
39-5 
25-4 
24-7 
25.5 
25.0 
13* 7 
17.0 
024. 2 
O17. 0 
19.0 
9,10.. .. 
81.8 
146. 0 
73-S 
34*0 
22. 5 
20. 5 
19- 7 
x6.2 
9-3 
XI.9 
613.0 
14.1 
14.6 
XI,12. ,. 
283. 0 
196. 0 
97-5 
49-5 
32-9 
29*5 
27. 8 
23*9 
X4-0 
x6. 7 
022. 7 
14.8 
15*1 
13,14. .. 
136.0 
156.0 
86.0 
42*5 
28. 6 
26. 2 
25-5 
20. 7 
ii. 7 
14- 8 
021. 2 
15*4 
14.4 
15,16. .. 
317*8 
196.0 
121.0 
57*a 
38-7 
35*2 
34*0 
29-7 
17.7 
20.8 
026. 7 
214.0 
19. 7 
17,18. ,. 
6710 
215-0 
92 - S 
34* 7 
21.0 
19- 7 
19-3 
16. 0 
9-1 
11.9 
O 20. 4 
13*5 
12.4 
19,20. .. 
200. 0 
307- 0 
119. 0 
49-5 
3i*4. 
28.5 
28.1 
23.6 
14. 2 
16.8 
0^3. 2 
17.8 
16.9 
21,22... 
118.0 
233-0 
100. 0 
40. 7 
25- 8 
24. 7 
24. 8 
19.8 
11.8 
1 5- 1 
O22.4 
15*0 
15.8 
23,24-• • 
273.0 
284- O 
126.0 
55*5 
36-7 
34*7 
33*3 
30.1 
17.9 
21. 6 
029.0 
20. 7 
20.3 
^Represents values for one soil, one determination having been lost. , , ., , ... 
b Represents values taken from average of preceding and succeeding determinations, both duplicates 
having been lost. 
Pig. i.—G raphs of the Quantity of carbon evolved as carbon dioxid in the control, limed, manured, and 
manured and limed soils. 
DISCUSSION OF THE CURVES 
In figure 1 are given the curves for the carbon lost from the control, 
the limed, the manured, and the manured and limed soils. Throughout 
the course of the experiment it is seen that the limed soil is losing more 
carbon than the corresponding unlimed. It can not be said with cer¬ 
tainty whether this is really due to an enhanced rate of decomposition 
