416 



Feeds and Feeding. 



protein-rich concentrates, consisting of wheat bran, dried brewers' 

 grains, and cotton-seed meal. The other lot was given 35 Ibs. corn 

 silage, no corn stover, and 2.5 Ibs. cotton-seed meal, together with 14 

 Ibs. of alfalfa hay in place of the rest of the rich concentrates given 

 to the first lot. 



In the second trial 2 lots of 4 cows each were fed for two 60-day 

 periods, one lot getting 40 Ibs. corn silage, 6.8 Ibs. corn stover, and a 

 little over 9 Ibs. of rich concentrates, and the other 35 Ibs. corn silage, 

 17.5 Ibs. of alfalfa hay, and no concentrates. In both trials the feed- 

 ing was reversed so that both lots were on both sides of the test. 



Substituting alfalfa hay for part or all of the rich concentrates in the 



ration. 



Studying the first trial we note that where alfalfa hay replaced 

 all the corn stover, some of the silage, and nearly all of the rich con- 

 centrates, there was a shrinkage of only 1 Ib. of milk per cow daily. 



The second trial was more severe, since 17.5 Ibs. of alfalfa hay re- 

 placed 5 Ibs. corn silage, 6.8 Ibs. corn stover, and over 9 Ibs. of rich 

 concentrates. In this trial each cow getting the heavy alfalfa-hay al- 

 lowance and no concentrates gave 4.2 Ibs. less milk per day than 

 those given more corn silage, some corn stover, and over 9 Ibs. of rich 

 concentrates. In both trials alfalfa hay shows a surprising feed 

 value. 



In a trial lasting 12 weeks with 8 cows at the New Mexico Station 1 

 Vernon found that 246 Ibs. of alfalfa hay alone, or 202 Ibs. of alfalfa 



t. 1904. 



