t solids 



not fat 



8.34 



8.41 



8.41 



8.36 



FORTY-SECOND ANNUAL CONVENTION 37 



at the University of Illinois by three months' periods gave the 

 following results. Grade Holstein cows were used : 



Lot I. 



Percent fat 



Period I — Silage in ration 3.38 



Period II — Stover and corn ration.. 3.28 



Lot 11. 

 Period II — Stover and corn in ration 3.28 

 Period II — Silage in ration 3.05 



There seems to be a slight tendency for milk higher in fat 

 to be produced on the ration containing silage. Emphasis should 

 not be given, however, to such a small variation. 



Eckles of the Missouri Station found that cows freshening 

 in a fleshy condition produce milk richer in butterfat for a time 

 after freshening than when they freshen in a thin condition. 

 * Observations which we have made indicate the same thing, 

 namely; the physical condition of the cow seems to have an 

 influence upon the sohd content of the milk she produces. 



The following data is taken from Missouri Bulletin No. 

 100: 



Percent of Fat in Milk by Months 



Average of 7 cows Average of 8 cows 



Fat at Normal at 



Months freshening freshening 



1 4-8 4-5 



2 47 4-4 



3 -47 4-3 



4 4.8 4-3 



5 4.9 4-4 



6 4.7 6.1 



Thin at 



Normal at 



reshening 



freshening 



4.0 



4.6 



3-9 



4-5 



4-3 



4.8 



4.8 



47 



4-7 



4-9 



4-9 



5.1 



