204 



MANUAL OF FARM ANIMALS 



The quantity of food which the milking cow requires will be 

 influenced by the amount of milk which she yields. This was 

 taken into account by Wolff and Lehman in their standard. 

 Thus we notice that a 1000-pound cow yielding 11 pounds of 

 milk daily requires 25 pounds of dry-matter, whereas one yield- 

 ing 22 pounds of milk per day requires 29 pounds of dry-matter 

 in her ration : — 



Wolff-Lehman standard, showing the amount of food required per 1000 

 pounds live weight for the growing and the mature cow yielding varying 

 ' quantities of milk 



, These standards were arranged to meet the need of the average 

 farm cow under normal conditions. They were not intended to 

 be absolute and fixed, but to be varied in practice as circum- 

 stances suggest. Of late years they have been subjected to 



