STANDARDS FOR MII<CH COWS 



177 



The sum of the maintenance and the milk production require- 

 ments is the amount required. 



As previously stated the standards in the table are on the 

 basis of 1,000 Ibs. live weight. Therefore to compute the stand- 

 ard for a cow of this weight (1,000 Ibs.) it is not necessary to 

 figure the maintenance and milk production requirements, as 

 this work has already been done and is included in the table. 



A Ration. The following ration for a cow weighing 1,000 

 Ibs. producing 25 Ibs. of milk daily, testing 4 per cent, butter fat, 

 illustrates how feed stuffs may be compounded to meet the 

 standards as laid down in this table. 



The carbohydrates and fat are a little high but the ration 

 approximates the standard close enough for all practical pur- 

 poses. 



A Narrow Nutritive Ratio is Sometimes Economical. Dairy- 

 men have learned by practical experience that Haecker's stand- 

 ards are too wide (that is there is too high a proportion of 

 carbohydrates and fat to protein) for the most economical pro- 

 duction of milk where protein is cheap and carbohydrates rela- 

 tively expensive. In all probability Haecker's table is suitable 

 for the Northwest and other sections where protein is expen- 

 sive and carbohydrates comparatively cheap. Prof. E. L. Jor- 



