Dec. 24, i9i7 Decomposition of Green and Stable Manures in Soil 687 
The stable manure used was fresh horse manure, not dried. The oats 
and clover were taken from samples grown in the greenhouse to about 
two-thirds maturity. Material was cut into half-inch lengths and 
weighed out while still in an unwilted condition and thus added to the 
soil immediately. At the same time that the samples of manure were 
added to their respective soils, several samples of the green and stable 
manures were weighed into suitable containers and dried in the oven at 
70° C. The weights were again taken, and from this the percentage of 
moisture in the samples as added was computed. The dried samples 
were finely ground and carbon determinations made on some of them. 
The results are given in Table VI. 
* Table VI. — Composition of the manures used in Experiment II 
Material. 
No. 
Weight 
taken. 
Dry 
weight. 
Average. 
Quantity 
of carbon 
ino.sgm. 
Average. 
Percent¬ 
age of 
carbon. 
Aver¬ 
age. 
Oats. 
I 
Gm, 
4 - 5 
4-5 
4-5 
4-5 
4-5 
4-5 
4-5 
4.5 
4 - 5 
4. ^ 
Gm. 
I. 52 
I* 39 
1.36 
i -45 
1. 49 
i- 5 i 
i* 32 
1. 32 
1. 30 
1. 31 
*- 3 i 
I. 37 
Gm. 
0. 2152 
. 2110 
43-04 
42. 20 
46. 58 
41. 96 
Do. 
2 
Do. 
7 
. 2329 
. 2098 
Do :. 
O 
4 
O.2172 
43 - 45 
Do. 
*r 
C 
Do. 
0 
6 
I* 454 
Clover... 
1 
. 2281 
45. 62 
46. 92 
43. 68 
44. 86 
Do. 
2 
. 2346 
. 2184 
* 2243 
Do. 
7 
Do. 
0 
A 
. 2263 
45. 26 
Do. 
*T 
c 
*T* 0 
4 - 5 
4. k 
Do.J 
D 
6 
1. 322 
| 
Stable manure.i 
1 
II* % 
0 / 
5-3 
5-6 
5-6 
5-35 
• 1930 
■ J 95 2 
■ 1936 
38.60 
39-°4 
38. 72 
Do.1 
2 
II. ^ 
Do. ! 
7 
0 
«-3 
3 
• I 939 
3®-7 
Do.1 
0 
4 
5- 39 
1 
An examination of the results in Table VI shows with what degree of 
uniformity in composition the samples of manures were as they were 
added to the soil. The experiment was started and carried through in 
all respects as the previous experiment. 
In Table VII will be found the results for the total amount of carbon 
given off as carbon dioxid. Owing to breakage, the alkali from the 
alkali towers of pots 17, 19, and 30, ran over into their respective soils 
and spoiled them early in the experiment. Targe molds appeared in 
pots 13 and 15 after several weeks, which accounts for the missing 
determination of those soils. A mold also appeared in No. 16, which 
was removed as soon as discovered. Since its duplicate had already 
been discarded, the values for the carbon dioxid of No. 16 were taken 
from the values found for the soils treated with the same amount of 
manure but without lime. It is of course realized that this does not 
have much justification, and, hence, the values for No. 16 should not 
be depended upon for any definite conclusion. 
23719°—17 - 2 
