220 



FOOD REQUIRED 



[chap. 



2-13 lb., and would contain i-02 lb. protein. Thus the 

 two would together have a starch equivalent of 

 1-85 +2-13 = 398, and would contain •22 + 102= 124 lb. 

 protein, or the fattening value of the ration has been 

 increased a trifle, while the amount of protein remains 

 the same, so that probably \ lb. could be taken off the 

 barley meal, as the amount of protein is already pretty 

 high. 



Dairy cows were receiving : — 



and it was desirable to substitute gluten meal and maize 

 as much as possible for the other concentrated foods, 

 which had become dear. We may calculate as 

 follows : — 



Thus we have to make up 6- 1 lb. of starch equivalent 

 and i-S lb. of protein. Gluten meal has a starch 

 equivalent of TJ and 33 per cent, of digestible protein ; 

 maize has a starch equivalent of 84, but only 7 per cent. 

 of digestible protein ; thus rather a smaller weight of 



