190(j.] 



PUBLIC DOCUMENT — No. 38. 



105 



Herd I. required slightly less dry and digestible matter to 

 make milk and milk ingredients in the second period. Herd 

 H. took a little more dry and digestible matter in the second 

 period to make a definite quantity of milk, milk solids and 

 milk fat. On the basis of the above figures, it may l)e con- 

 cluded that the bran ration produced a trifle better results 

 than the silasre ration. 



Food Cost of Milk and Butter. 

 Herd I. : both periods, brau ration. 



Herd II.: first period, bran ration; second period, silage ration. 



The cost of milk and butter is based upon hay at $15 a 

 ton, silage at $3.50, bran at $22, corn and cob meal at |26, 

 cotton-seed meal at $30 and middlings at $25. The cost of 

 milk and butter produced by Herd I. in both periods was 

 nearly identical, and the slight variations ma}^ be attributed 

 to experimental error. The increased cost of the milk and 

 butter produced by Herd H. in the second period was due 

 largely to the then existing excess cost of the corn and cob 

 meal over that of the bran, and not to the feeding efiect of 

 the two rations. 



Fertilizer Iiigredienls in Rations ( Cost) . 



First period: Herd I., bran ration. 



19.46 pounds nitrogen, valued at . . . . $3 31 



13.81 pounds potash, valued at ... . G9 



7.75 pounds phosphoric aiud, valued at . . . 31 



Total, $4 31 



