THE RATIONAL FEEDING OF DAIRY STOCK 141 



2 pounds of bran are obtained by multiplying the per 

 cent of each digestible nutrient by the weight of the 

 material used. The pounds of digestible protein, car- 

 bohydrates, and fat in the several foods are as follows : 



.76 x 2.25 = 1.71 ; 



2.08 



= 7 nutritive ratio. 



Heat units: (13.23 + 2.08) x 1860 = 28,476.6 



.76 x 4225 = 3,211.0 



Total 31,687.6 



This ration contains 2.08 pounds of digestible pro- 

 tein, 13.23 pounds of digestible carbohydrates, and 

 .76 pound of digestible fats. The nutritive ratio 

 is 1 to 7, and the ration yields a total of 31,687.6 

 calories. Compared with the requirements of a 

 standard ration for a cow giving 25 to 30 pounds 

 of milk, it will be found that these amounts con- 

 form sufficiently to the standard to warrant this 

 ration being used. It is to be noted that the pro- 



