BULLETIN No. 80c. 
11 
IT. FERTILIZING CONSTITUENTS RECOVERED IN MANURE IN 
THESE EXPERIMENTS. 
This experiment to determine the digestibility of cotton seed hulls 
also furnishes data to show what proportion of the fertilizing constitu¬ 
ents fed are returned in the excrement (dung, urine and milk). The 
following table contains the percentages and amounts of the different fer¬ 
tilizing elements in the hulls fed, and in the dung, urine, and milk ex¬ 
creted : 
TABLE VII. 
FERTILIZING CONSTITUENTS IN COTTON SEED HULLS FED AND 
EXCRETED DURING DIGESTION EXPERIMENT. 
Fed in cotton seed 
hulls—4 days. 
Excreted in dung—4 
days. 
Excreted in urine—4 
days. 
Excreted in milk—4 
days. 
Total excreted. 
Fed and not excreted. 
Excreted and not fed. 
Per cent, excreted. 
Total 
Amount. 
Oz. 
834.33 
1495.5 
231.5 
50. 
1777.0 
Dry 
Matter. 
Oz. 
738.80 
473.44 
CONTAINING 
Nitrogen in 
Pr. 
Ct. 
.790 
.968 
.814 
.579 
Oz. 
5.837 
4.583 
1.884 
.289 
6.756 
.919 
115.74 
Phos. Acid. 
(P 2 0 5 ) in 
Pr. 
Ct. 
Oz. 
.199 
.371 
.051 
1.470 
1.756 
.118 
1.874 
.404 
127.48 
Potash (K 2 O) 
in 
Pr. Ct. 
1.806 
1.180 
1.638 
Oz. 
13.343 
5.587 
3.792 
9.379 
3.964 
70.29 
The milk and urine were analyzed each day to prevent loss from de¬ 
composition. From this table it will be seen that more nitrogen and 
phosphoric acid were excreted than fed. This increase of nitrogen ex¬ 
creted over that fed is no doubt due to loss of flesh during the experi¬ 
ment and indicates that cotton seed hulls did not constitute a mainten¬ 
ance ration for the animal. To ascertain if cotton seed hulls alone 
would keep an animal without loss of flesh was another object of the 
experiment, and the above table contains figures of interest, pointing to 
a negative answer. 
The following table contains like results to the foregoing for a ration 
of cotton seed hulls and meal, in whieh three pounds of cotton seed 
meal were fed each day or 12 pounds during the four days : 
