150 THE BUSINESS OF DAIRYING 



the protein was largely purchased in the form of 

 feeds commonly used by dairymen, namely, dried 

 brewers' grains and cottonseed meal. 



It was planned to have each ration contain the 

 same amount of total protein, the amount of milk 

 obtained, other things being equal, being the meas- 

 ure of the relative value of the protein in the two 

 rations. A comparison of the rations shows that 

 they contained practically the same amount of dry 

 matter and protein, namely, 19.99 pounds and 3.03 

 pounds, respectively, in the silage and clover ration, 

 and 19.44 pounds and 3.02 pounds in the feed ration. 

 The nutritive ratio was calculated and found to be 

 1 :6 in each ration. 



During the first period Lot I. was fed the silage 

 and clover ration, and at the beginning of the sec- 

 ond period this lot was changed to the feed ration. 

 Lot n. was fed during the first period on the feed 

 ration and during the second period on the silage 

 and clover ration. The object of the changes was 

 to equalize the effect of advance in the period of 

 lactation. 



The results showed that the amount of milk and 

 butter produced from the two rations was practi- 

 cally the same. The home-grown ration producing 

 1,485.1 pounds of milk and 65.89 pounds of butter 

 fat, and the feed ration 1,473 pounds of milk and 

 68.97 pounds of butter fat, a difference of 12. i 

 pounds of milk in favor of the home-grown ration. 

 These results show that it was practical, in this 

 instance, from the feeder's standpoint, to grow the 

 entire ration upon the farm. 



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