1895.] PUBLIC DOCUMENT — No. 33. 43 



of the three series of experiments, besides furnishing a better 

 quality of manure. 



2. During the autumn, winter and spring months from 

 2.5 to 3 pounds of protein can be fed daily to dairy cows 

 in good condition (on a basis of 1,000 pounds live weight) 

 with economy and consequent profit. During the summer 

 months it might not be advisable to feed over 2.5 pounds of 

 digestible protein in the fodder ration in case of stall-fed 

 cows, and one should be especially careful at that season 

 about feeding grains containing an excess of fat (see caution 

 elsewhere). 



3. When as low as 1.3 pounds of protein were fed daily, 

 the total digestible organic matter at the same time being 

 sufficient for the animal's daily needs, the cjuality of the 

 milk, especially its fat content, was below that produced by 

 a ration containing 2.5 to 3 pounds of digestible protein. 



4. When 3 pounds of protein were fed in the daily 

 ration there was an indication that its influence upon the 

 quality of the milk ceased to be felt.* 



5. All of the cows were not aft'ected alike by the same 

 fodder ration. 



. 6. The total solid matter in the milk was much less 

 affected than the fat. 



7. This experiment points out the economy of feeding 

 properly balanced rations in order to secure maximum and 

 long-continued milk yields, as well as the l)est quality of 

 manure. 



General Introduction. 



The German investigator, E. von Wolff, f who has closely 

 studied the results of all German investigators concerning 

 the most suital)le fodder rations for milch cows, has given 

 the following standard ration on a basis of 1,000 pounds 

 live weight : — 



Digestible protein, 2.50 lbs. 



Digestible fat, 0.60 " 



Digestible carbohydrates, 13.00 " 



Nutritive ratio, 1:5.4 



* It is hoped that it will be possible to still fiu-ther study this qticstion of the 

 effect of food and especially protein upon the quality and quantity of the niillc pro- 

 duced. 



t Die Ernahmng der Landwirthschaftliche Niitzthiere, 1870, p. 548. 



