FEEDING FOR MILK PRODUCTION 261 



ing cow, which is the one usually underfed. The line a to c 

 represents the total capacity of the animal for food, or a full 

 ration. The first half, from a to 6, represents the amount of 

 food required to maintain the animal's body, or the ration 

 of maintenance. The second half, that portion from b to c, 

 represents the proportion of the food used for the production 

 of milk. In this case there is no fat being produced on 

 the animal's body, and the cow is supposed to be of such 

 dairy quality that all the feed she can eat in excess of that 

 required for maintenance is used for milk production. 



Foil RATION 

 Ration of Maintenance. Used for MilK bred action 





Ration of Maintenance. ** i/H Pr * *"*'* 

 ^^^^^^ 



WAlP R/tf lOfl 



The line below represents what would happen if the feed 

 of this animal is reduced one fourth. The ration of main- 

 tenance remains practically the same as in the first case. 

 The amount represented by the line d to e is the amount 

 required to maintain the animal's body, which is the 'same 

 quantity as in the first case ; however, the cut of one fourth 

 in the ration will be seen to come entirely on that available 

 for milk production, and reduces that amount one half. 



Suppose that the ration of such a cow be still further re- 

 duced to one half of the full ration, or that required for main- 

 tenance alone, as represented by the third line. In this case 



