L064 
Journal of Agricultural Research 
Vol. XXXI, No. 11 
Table VIII. — Carbon and nitrogen lost per day through the drying of the dung and 
urine mixture 
Experiment, 
animal, and 
period Nos. 
Dry 
mat¬ 
ter “ 
Water 
Nitro¬ 
gen 
lost 
Carbon lost 
Energy 
equivalents 
Energy of air- 
dry material, 
corrected— 
Total 
Com¬ 
bined 
with 
nitro¬ 
gen 
From 
carbo- 
hy¬ 
drate 
NX 
5.45 
Starch 
cx 
9.4 
Energy 
of 
air-dry 
ma¬ 
terial 
For 
nitro¬ 
gen 
For ni¬ 
trogen 
and 
carbo¬ 
hydrate 
fermen¬ 
tation 
Grams 
Grams 
Grams 
Grams 
Grams 
Grams 
Cals . 
Cals. 
Cals. 
Cals. 
Cals. 
221D-885-I_ 
1,349.1 
8,093. 5 
*>54.5 
‘ 62. 7 
23.4 
‘39.3 
297.0 
‘ 369.4 
5,928.6 
6,225.6 
6,595.0 
II_ 
1, 982.9 
14,682.9 
*>74.8 
‘ 86. 0 
32.1 
‘53.9 
407.7 
‘ 506. 7 
8,745. 7 
9,153.4 
9,660.1 
III__. 
1, 355. 0 
9,097.9 
*> 52.3 
‘ 60.1 
22.4 
‘37.7 
285.0 
‘ 354.4 
5,869. 3 
6,154.3 
6, 508. 7 
221D-886-I_ 
1,396. 4 
7,901. 2 
*> 49. 9 
‘ 57.4 
21.4 
‘36.0 
272.0 
‘ 338.4 
6,071.4 
6,343.4 
6,681.8 
II 
2, 200.3 
13,434. 2 
b 82. 8 
« 95. 2 
35.5 
‘59.7 
451.3 
‘ 561. 2 
9,557. 2 
10,008. 5 
10,569.7 
Ill 
1, 347. 8 
9; 161. 5 
*> 53. 5 
‘ 61.5 
23.0 
‘38.5 
291.6 
‘ 361.9 
5,863. 6 
6,155. 2 
6,517.1 
221E-885-1_ 
1,672.8 
10; 180. 5 
*> 53. 2 
‘ 61.2 
22.8 
‘38.4 
289.9 
‘ 361.0 
7,394.1 
7,684.0 
8,045.0 
II_ 
1,218. 3 
7; 799. 5 
48.1 
69.3 
20.6 
48.7 
262.1 
45L8j 
5,271.9 
5,534.0 
5,991.8 
221F-874-1. 
2,225. 8 
11,144. 2 
78.3 
71.9 
33.6 
38.3 
426.7 
360.0 
9,850.0 
10,276.7 
10,636.7 
II_ 
1,516.0 
7, 512.4 
50.3 
58.8 
21.6 
37.2 
274.1 
349.7 
6,641. 5 
6,915.6 
7,265.3 
221F-887-1_ 
1,887.4 
111 543. 3 
82.0 
70.7 
* 35.2 
35.5 
446.9 
333.7 
8,400.1 
8,847.0 
9,180.7 
II_ 
1,296. 5 
7,626.2 
59.2 
48.5 
25.4 
23.1 
322.6 
217.1 
5,697. 0 
6,019.6 
6,236. 7 
Cows in milk 
* 
09117. _SSfi-T 
b 79 9 
e 91. 9 
34.3 
‘ 57. 6 
435.5 
‘ 541.4 
TT 
75 9 
69.8 
32.6 
37.2 
413.7 
349.7 
991 TT. 874—T 
*> 65. 2 
c 75.0 
28.0 
‘47.0 
355.3 
441.8 
b 60 0 
e 69. 0 
25. 7 
‘43.3 
327.0 
‘ 407.0 
' 
991F R8fi-T 
83 9 
119.6 
36. 0 
83.6 
457.3 
785.8 
TT 
96 8 
124. 7 
41. 5 
83.2 
527.6 
782.1 
991 ft 887 T 
75 7 
108.3 
32.5 
75.8 
412.6 
712.5 
TT 
58 5 
82 2 
25.1 
57.1 
318.9 
536.7 
TTT 
61 4 
79. 3 
26. 3 
53. 0 
334.6 
498.2 
TV 
87.3 
83.5 
37. 5 
46.0 
475.8 
432.4 
a Not corrected for loss on drying. 
b Not included in average used to obtain data for carbon correction. 
«Computed factors: 
1 gram 002.25 grams starch. 
1 gram N lostOl.15 grams carbon lost. 
1 gram carbon lostOO.627 gram carbon from fermentation of carbohydrates. 
• 1 gram N03.43 grams ammonium carbonate. 
1 gram carbon of carbohydrate fermented (starch) 09.4. Cal. ^ 
Ratio of carbon to nitrogen in urea or in ammonium carbonate ^=0.429. 
In Table IX similar data for the loss during the drying of the dung 
alone have been compiled for reference. The dung alone is used only 
in arriving at approximate figures for the apparent digestibility, and 
the data available for the loss on drying are few and widely variable. 
Therefore, it has seemed best not to apply the correction to the 
carbon and energy of the dung alone in this particular series of experi¬ 
ments, but rather to place the data on record in order to call atten¬ 
tion to the fact that the loss of carbon, and its equivalent energy, 
during the preparation of samples of feces for analysis, is a material 
and a variable factor which must be taken into account in exact 
experimentation involving digestibility. 
