FACTORS THAT AFFECT COMPOSITION OF MILK 65 



she was put on a ration that was calculated to be sufficient only 

 to maintain her body weight and she was continued under this 

 condition for thirty days. The grain ration fed was a mixture 

 of corn 4 parts, bran 2 parts, and oilmeal 1 part. With this 

 was fed the best quality of alfalfa hay. The amount of each 

 given is shown in the table. At the beginning she produced 21 



Effect of Under-feeding upon the Percentage of Fat in Milk. 



Jeksey Cow No. 20 



Days after 



Per Cent 



Yield of 



Grain Fed, 



Alfalfa Hay- 



Weight, 



Calving 



Fat 



Milk 



Lb. 



Fed, Lb. 



Lb. 



2 



4.37 



22.2 



3.5 



7 



830 



4 



5.80 



20.9 



3.5 



7 



807 



6 



6.89 



22.3 



3.5 



7 



790 



8 



7.21 



23.1 



3.5 



7 



787 



10 



6.60 



22.6 



3.5 



7 



785 



12 



5.86 



21.5 



3.5 



7 



780 



14 



6.82 



20.0 



3.5 



7 



765 



16 



6.00 



19.1 



3.5 



7 



755 



18 



5.07 



21.8 



3.5 



7 



755 



20 



4.94 



17.2 



3.5 



7 



730 



22 



6.37 



19.0 



3.5 



7 



730 



24 



6.82 



19.6 



3.5 



7 



725 



26 



5.70 



19.1 



3.5 



7 



720 



28 



6.26 



17.8 



3.5 



7 



720 



30 



5.60 



19.9 



3.5 



7 



710 



32 



5.53 



20.4 



5.5 



/ 11 



690 



34 



4.74 



24.4 



7 



11 



710 



36 



4.28 



25.4 



7 



14 



710 



38 



4.49 



25.0 



7 



14 



720 



40 



4.45 



25.0 



7 



14 



710 



42 



3.98 



27.2 



7 



14 



715 



44 



4.83 



26.7 



7 



14 



740 



46 



4.27 



26.1 



8 



16 



700 



48 



3.80 



25.9 



8 



16 



735 



50 



4.23 



27.0 



8 



16 



747 



52 



— 



25.6 



8 



16 



725 



54 



4.01 



25.7 



8 



16 



715 



56 



4.47 



23.7 



8 



16 



720 



58 



4.37 



24.3 



8 



16 



• 740 



