TANKAGE FOR DAIRY COWS 



Table 7. — Summary of average gains in live weight. 



On Soybean- On Tankage 



cottonseed Ration 



Ration 



(Pounds) (Pounds) 



First 40-day feeding period 18 15 



Second 40-day feeding period 17 26 



Third 40-day feeding period 42 45 



Fourth 40-day feeding period -7 -5 



Net total 70* 81* 



*These values represent average gains by individual cows. 



Table 8. — Milk production (corrected to 4 percent fat). 



On Soybean- On Tankage 



cottonseed Ration 



Ration 



(Pounds) (Pounds) 



First 30-day period 11,273.0 11,213.9 



Second 30-day period 10,402.6 10,745.6 



Third 30-day period 9,052.8 9,670.8 



Fourth 30-day period 8,614.3 8,396.7 



Total production 39,342.7 40,027.0 



Average daily production per cow 1 28.1 28.6 



•Obtained by dividing the total by 1400, the number of cow days on each ration. 

 If all individuals in each group had milked throughout the duration of the experi- 

 ment, the number of cow days would have been 1440. One cow in each group dried 

 off sooner than anticipated, and both were removed on the same day — forty days 

 previous to the end of the experiment. 



Table 9. — Composition of the milk (percentages). 



On Soybean- On Tankage 



cottonseed Ration 

 Ration 



Total solids 12.76 12.77 



Fat 3.96 3.99 



Ash .731 .728 



Flavor of the Milk 



The composite samples taken for analysis were also scored for flavor, preserva- 

 tive having been purposely omitted with this in mind. The samples were kept 

 sweet by refrigeration and scored (except in one instance) on the same day on 

 which the final aliquots were taken. 1 



On the samples taken in December and April the decision was 3 to 1 that the 

 milk from the cows receiving the soybean-cottonseed ration had slightly the 



•Acknowledgement is made to M. J. Mack and H. G. Lindquist of the Department of Dairy 

 Industry of Massachusetts State College, who with two graduate assistants made the tests for milk 

 flavor; also to W. S. Mueller of the same department, who tested the whipping quality of the cream. 



