32 BULLETIN 1166, U. S. DEPARTMENT OF AGRICULTURE. 
How can the apparently conflicting results of the two trials of 
apple-pectin pulp be reconciled? If, in general, beet pulp tends to 
produce more milk than corn silage per pound of dry matter fed, 
it follows that the pectin pulp would make a better showing against 
the corn silage. The total available records 44 of feeding experi- 
ments directly or indirectly bearing on the relative production values 
of the dry matter in corn silage and beet pulp favor the beet pulp. 
Furthermore, for every pound of pectin pulp actually consumed in 
the tests, more beet pulp dry matter than corn silage dry matter was 
eaten. Also the earlier trial, using corn silage, was conducted in 
midwinter, while the test using beet pulp was made in late spring 
and summer. Any falling oft' in appetite during hot weather of 
cattle accustomed to such liberal feeding as were the cows used in 
these tests would be likely to manifest itself in a refusal to clean up 
the less familiar feed. At higher temperatures the long soaking 45 to 
which the pulp was subjected preparatory to being fed might in- 
juriously affect its palatability and wholesomeness. A palatability 
test made the latter part of September, while not taking account of 
daily temperature, showed a gradual lessening of palatability of wet 
pectin pulp on standing. The season then at which the trial was 
made may have had an effect on the relative yields, as it is generally 
understood that, other factors being equal, lowered palatability is 
reflected in lower returns. 
Dried apple-pectin pulp should prove of value as feed for the 
dairy cow. It may be classed as a bulky, carbonaceous semiconcen- 
trate, high in crude fiber, similar to dried beet pulp. Because dried 
pectin pulp has the property of absorbing large quantities of water 
and swelling, when fed liberally it should be well moistened with 
water an hour or so before feeding. 
Pound for pound of dry matter fed, it seemed to be superior to 
good corn silage, perhaps intermediate between that and beet pulp 
as a succulent feed for cows in lactation. Its superior showing over 
corn silage, however, cannot be accepted as conclusive. 
The palatability of pectin pulp appeared to vary. Certain of 
the cows under test in the hot weather refused the soaked pulp. 
However, the loss of appetite for the pectin pulp may in part be 
attributed to the fact that it was an unfamiliar feed. 46 Dried apple- 
pectin pulp absorbs molasses readily, and becomes more palatable 
by its addition. As the vehicle in a molasses feed, it should prove as 
satisfactory as dried pomace is reported by foreign investigators 
to be. 
While it is probable that the extraction with boiling water to 
which the apple-pectin pulp is subjected during its process of manu- 
facture and the subsequent heating during drying removes the 
hydrocyanic acid, any apple product which contains an excessively 
large quantity of seeds should be fed with caution. 
44 References in the literature cited on which this statement is based are 21, 29, 2,2. 
and S3. 
45 Soaking from one feeding until the next involves subjecting the feed over nigbt to 
conditions which in hot weather might be conducive to fermentations capable of affect- 
ing the quality of the " mash." 
46 Much the same difficulties were encountered when dried beet pulp was being intro- 
duced as a feeding stuff (22, 23). 
