8 
BULLETIN 1272, U. S. DEPARTMEOT OF AGRICULTURE 
was fed at the rate of 30 to 35 pounds per cow per day and alfalfa 
hay at the rate of 6 pounds. The grain mixture consisted of corn- 
and-cob meal 250 pounds, wheat bran 200 pounds, and cottonseed 
meal 100 pounds, and was fed at the rate of from 7 to 10 pounds a 
day. Table 13 gives the results of the experiment. 
Table 13. — Comparative results of feeding potato silage and corn silage 
Quantity of feed 
Yield 
Gain in 
Group 
Grain 
Hay 
Potato 
silage 
Corn 
silage 
Milk 
Butter- 
fat 
body 
weight 
Pounds 
1,588 
1,590 
Pounds 
1,080 
1,080 
Pounds 
5,700 
Pounds 
~""~5,~766~ 
Pounds 
3, 269. 2 
3, 330. 8 
Pounds 
157. 73 
163. 57 
Pounds 
157 
138 
The corn-silage groups produced slightly more milk and butter- 
fat but gained less in weight. The differences, however, are so 
small that the two silages may be considered of equal value for 
feeding dairy cows. The potato silage seemed to be as palatable 
as the best corn silage and more so than the corn silage that was 
5 years old. 
APPLE-PECTIN PULP COMPARED WITH BEET PULP 
Dried apple-pectin pulp, a by-product in the extraction of pectin 
from apple pomace, was furnished by the Bureau of Chemistry for 
use in the feeding experiment reported below. Since the dried 
Eectin pulp was similar to dried beet pulp in composition and in 
eing able to absorb water readily, it was considered best to use 
beet pulp as the feed with which to make comparison. Six cows 
were fed for two 30-day periods. 
Both apple-pectin pulp and beet pulp were fed wet with 3 pounds 
of water to each pound of dry pulp. The pulp soaked from one 
feeding to the next and 40 pounds oi the wet pulp per day were of- 
fered to each cow. The remainder of the ration consisted of alfalfa 
hay, about 10 pounds, and a grain mixture composed of corn meal 
100 pounds, ground oats 100 pounds, wheat bran 100 pounds, lin- 
seed meal 50 pounds, and cottonseed meal 50 pounds, fed at the rate 
of from 10 to 12 pounds for each pound of fat produced. The feed 
consumed and the production are given in Taole 14. 
Table 14. — Comparative results of feeding apple-pectin pulp and beet pulp 
Quantity of feed 
Yield 
Gain or 
loss (— ) 
in body 
weight 
Group 
Wet 
pulp 
Alfalfa 
hay 
Grain 
Milk 
Butter- 
fat 
Pectin-pulp groups. .. 
Pounds 
6,759 
7,200 
Pounds 
1,785 
1,800 
Pounds 
1, 627. 6 
1, 839. 2 
Pounds 
4, 375. 7 
4, 976. 5 
Pounds 
152. 93 
171.86 
Pounds 
-67 
109 
