12 
N. C. AGRICULTURAL EXPERIMENT STATION. 
TABLE VIII. 
<W 
FERTILIZING CONSTITUENTS IN COTTON SEED HULLS AND MEAL 
FED AND EXCRETED*DURING DIGESTION EXPERIMENT. 
Total 
Amount. 
Oz. 
Drv 
Matter. 
Oz. 
CONTAINING 
1 - _ 
Nitrogen in 
Phos. Acid 
(P 2 0 5 ) in 
Potash (K 2 O) 
in 
Pr. 
Ct. 
Oz. 
Pr. Ct. 
Oz. 
Pr. Ct. 
Oz. 
Fed in cotton seed 
hulls — 4 days_ 
1344 
1190.24 
.790 
9.403 
.199 
2.369 
1.806 
21.496 
Fed in cotton seed 
meal — 4 days . 
1-92 
178.69 
6.886 
12.304 
2.89 
5.164 
2.138 
3.820 
Total in food... . 
1536 
1368.93 
21.707 
7.533 
25.316 
Excreted in dung — 4 
days . 
2498 
754.60 
1.600 
12.074 
.837 
6.316 
1.207 
9.108 
Excreted in urine: 
1st dav.... 
159 
1.22 
1 940 
084 
1 34 
1 202 
i on 
2d day. 
187 
1.10 
2 057 
089 
166 
1 Li 
1 374 
I .c/1 I 
9 ^7(\ 
3d day. 
122 
1.26 
1 537 
087 
106 
1 973 
L.O i \J 
4th dav.. 
122.5 
1.36 
1.666 
.090 
.110 
1.243 
I.uOd 
1.523 
Total excrete d i n 
urine. 
590.5 
7.200 
.516 
7.557 
Excreted in milk—4 
days. 
76 0 
.565 
.429 
Total excreted. 
3164.5 
19.703 
6 832 
1 6 665, 
Fed and not excreted. 
2 004 
701 
8 651 
Per cent, excreted. 
90.76 
90.69 
1 
65.82 
The fertilizing elements excreted in this case were all below the quan¬ 
tities fed. This excess of nitrogen fed over that excreted indicates that 
the animal was gaining flesh on this ration, instead of losing, as she was 
when eating hulls alone. 
This table shows that over 90 per cent, of the nitrogen and phos¬ 
phoric acid and nearly 66 per cent, of the potash fed were excreted and 
recovered in the manure. It is usually estimated that 80 per cent, of 
the fertilizing constituents fed in a food-stuff are excreted in the manure. 
The experiment at hand gives 82.42 per cent., while the first on an in¬ 
sufficient diet (cotton seed hulls alone) gave 104.62 per cent., or more 
than the quantities fed. 
An inspection of Table IX and the two preceding tables will show 
that the value of farm-yard manure depends upon what is fed. Cotton 
seed hulls, being poor in fertilizing elements, furnish a manure corre¬ 
spondingly low in value. The meal, on the other hand, is very rich in 
fertilizing constituents and enhances the value of the manure in propor¬ 
tion to the amount of it fed with hulls or other coarse fodders. 
