VALUES OF VARIOUS NEW FEEDS FOR DAIRY COWS 9 
The pectin-puip groups ate less of the pulp, produced less, and lost 
in weight, whereas the beet-pulp groups gained in weight. Neither 
is the pectin pulp so palatable as the beet pulp, as three of the six 
cows refused part or all of the pectin pulp at some time or other dur- 
ing the experiment, while the beet pulp was at no time refused. The 
data show that the apple-pectin pulp is not so valuable pound for 
pound as beet pulp for dairy cows, although no exact comparison of 
values is possible. 
HYDROLYZED SAWDUST COMPARED WITH CORN MEAL 
Hydrolyzed sawdust furnished by the Forest Service from its 
laboratory at Madison, Wis., was fed in comparison with corn meal. 
This sawjust was thought to possess some nutritive value on account 
of the changes brought about in the cellulose by the treatment with 
dilute acids, which would make it more available to the animal. 
While a preliminary experiment conducted previously at this station 
indicated that the sawdust was somewhat lacking in palat ability 
and contained a large proportion of material of no feeding value, it 
was nevertheless thought advisable to give it a more thorough test. 
The Wisconsin Agricultural Experiment Station, as a result of 
two trials with the hydrolyzed sawdust, found that it could form 
one-fourth to one-third of the concentrate mixture and that it could 
be substituted for corn or barley in the mixture without affecting 
the normal milk flow. The cows maintained their live weight 
slightly better when receiving the sawdust. The nutritive values 
of the sawdust as compared with corn and barley are not stated in 
the report of those experiments. 3 
In the experiment here reported two Holstein and four Jersey 
cows were divided into two groups balanced as nearly as possible as 
regards breed, production, body weight, and stage of lactation. The 
production of these cows at the beginning of the test was approxi- 
mately as shown in Table 15. 
Table 15. — Production of cows at beginning of hydroly zed-saw dust experiment 
Cow No. 
Milk per 
day 
Butterfat 
in milk 
227 
Pounds 
27 
21 
19 
22 
21 
38 
Per cent 
3.2 
459 
4.0 
411 . 
4.5 
441 
4.8 
416 _ 
4.8 
257 
3.4 
The cows were fed by the reversal method for two periods of 70 
days each, 10 days being allowed at the beginning and at the end of 
the first half for the cows to become accustomed to the change in 
the rations. 
Since it was thought that corn would be the material most likely 
to be replaced by the sawdust in case of its coming into use as a 
dairy feed, the rations for the two groups of cows were so prepared 
and fed that 2 pounds of sawdust replaced 1 pound of corn meal. 
3 Address by Prof. F. B. Morrison before the American Society of Animal Production, 1921. 
