EFFECT OF SILAGE ON FLAVOR AND ODOR OF MILK. 



9 



nized in over 85 per cent of the cases. Although sufficient flavor and 

 odor were present in the milk to be detected in this number of cases 

 by men examining the milk carefully, it is probable that the feeding 

 of 10 pounds of silage, as above, did not affect the milk sufficiently 

 to be noted by the average consumer. 



EFFECT OF AERATION. 



To determine the effect of aeration on the feed flavor and odor 

 present, the same milk, after being sampled and while still warm, 

 was passed over a surface cooler and resampled. The results in 

 Table 3 show that when the milk was aerated a part of the feed 

 flavor and odor it contained was removed- The table shows that, in 

 the aerated milk, feed flavors and odors were noted in six samples 

 fewer than in the milk before aeration. They were reduced in de- 

 gree also in the other samples. 



The cows not receiving silage occupied and were milked in alter- 

 nate stalls from those receiving silage. In the table it is seen that 

 in over 96 per cent of the cases no feed flavor or odor was observed 

 in the milk drawn from cows standing in the same barn side by side 

 with the cows fed silage. 



This experiment shows that the feeding of 10 pounds of corn silage 

 one hour before milking gave a perceptible feed flavor and odor to 

 the milk. It further shows that if such milk is carefully aerated 

 while still warm, the degree' of flavor and odor may be materially 

 diminished. In the opinion of the judges, the silage flavor present in 

 the milk often enhanced rather than detracted from its palatability. 



4. FEEDING 20 POUNDS OF CORN SILAGE BEFORE: MILKING 



In the next experiment, the quantity of corn silage fed before milk- 

 ing was increased to 20 pounds. 



Table 4. — Effect of feeding 20 pounds of corn silage once a day one hour before 



mdlJcing. 





Result 



of sampling. 



Milk from cows fed 

 silage. 



MUk from 

 cows not 

 fed silage. 





Before 

 aeration. 



After 

 aeration. 





25 



25 



25 











Off flavor 



IS 



7 



18 



7 







No off flavor. . - - - . 



25 











OfJodor 



25 

 



20 

 5 









25 











The results in Table 4 show that the feeding of 20 pounds of corn 

 silage each to cows one hour before milking gave the milk sufficient 

 feed flavor or odor to be detected in all of the samples. The flavors 

 108550°— 22 2 



