116 



Feeds and Feeding. 



IV. THE HAECKER STANDARD FOR DAIRY Cows. 



As the result of long years of intimate study with a high- 

 grade working dairy herd at the Minnesota Station, 1 Haecker holds 

 that the feed requirements of the dairy cow vary not only accord- 

 ing to her weight and the quantity of milk yielded, but also ac- 

 cording to its quality. 



140. The Haecker standard. In his standard Haecker first sets 

 down the total digestible nutrients daily required to maintain the 

 1000-lb. cow, independent of the milk she produces, as follows: 

 Crude protein 0.7 lb., carbohydrates 7.0 Ibs., and fat 0.1 Ib. 



For each 100 Ibs. in live weight the cow may exceed or fall 

 below the 1000-lb. standard there is added or subtracted one-tenth 

 of the standard ration. 



To this maintenance provision the further allowance set forth 

 in the table is made. 



Haeclcer's feeding standard for the dairy cow. 



The table shows that if a cow is yielding milk containing 3 

 per ct. of butter fat, she should be fed in addition to the main- 

 tenance ration 0.040 lb. crude protein, 0.19 lb. carbohydrates, and 

 0.015 lb. fat, all digestible, for each lb. of milk she gives. If the 

 milk is richer than 3 per ct. the provision must be greater. 



To illustrate the use of the table there is below formulated the 

 nutrient allowance for a 1100-lb. cow producing 25 Ibs. of 4 per 

 ct. milk daily: 



1 Buls. 35, 67, 71, 79, and information to the author. 



