1 84 THE CHEMISTRY OF CATTLE FEEDING 



of the roots and all the cake and meal available for milk pro- 

 duction an economical arrangement. The average yield of 

 milk was 2*14 gallons, for which 0*92 Ib. of digestible protein 

 and 3*7 Ibs. of "starch" would be required. The excess of 

 protein in the concentrated food is just sufficient to counter- 

 balance the deficiency in the maintenance ration, but the 

 considerable excess of non-nitrogenous nutrients would be 

 wasted. 



RATION III. 



The average yield of milk was 2*03 gallons, for which 0*87 

 Ib. of digestible protein and 3-45 Ibs. of "starch" would be 

 required. After allowing for the deficiency of protein in the 

 maintenance ration, there still remains a slight excess of this 

 ingredient, and also of non-nitrogenous nutrients. On the 

 whole, this ration must be considered very satisfactory, both 

 from a chemical and a pecuniary standpoint; but for other 

 reasons practical men consider it inadvisable to feed such a 

 large quantity of wet grains. 



The next two rations represent the opposite extremes of 

 bad management. One is utterly inadequate, and the other 

 contains nearly twice the amount of nutrients required. Both 

 rations were actually used by practical farmers. 



RATION IV. 



