-2IO ILLINOIS DAIRYMEN'S ASSOCIATION. 



charged with .044 of a pound of available protein to a pound of mill 

 yielded, while the cow that gave milk containing 2.5 per cent fat receivec 

 .04 of a pound of available protein to each pound of milk yielded and thai 

 the herd received on an average 2 pounds of protein daily, yielded 25. 2< 

 pounds of milk, testing 4.07 per cent fat, being 22 points above average 

 quality, and stands charged with .048 of available protein to a pound o 

 milk yielded, being about 60 per cent of the amount given in the Wolff 

 Lehmann standard Of the 12 cows employed in this work 4 were heifer 

 — three with first calf and one having aborted with the second. The co\ 

 Belle was a stranger in the herd, was in milk when she came to the her< 

 and was at times fed a ration varying some from that fixed for the experi 

 merit, because she showed indications of losing her appetite, and Lydia 

 on February 11, was in a feverish condition, which caused her to shr4nl 

 in milk, and her milk tested 6.4 both in the morning and evening. So tin 

 results that were, obtained 1 in* this experiment met with such difficultie 

 as ordinarily occur in the management of a herd of dairy cows. It is no 

 claimed that the cows used or needed just the amount of protein that wa 

 provided; nor that each cow, or in fact that any cow, used just at th< 

 rate of .7 of a pound of protein daily per one thousand pounds live weight 

 but for the time being we used this factor because it is in common us< 

 and because after three winters' work with barren cows on food of main 

 r.enance we consider it a safe one to apply to cows when yielding mill 

 and growing a foetus. Taking the average amount of available proteii 

 charged to the cows in the two experiments reviewed, as a basis, i 

 suggests that an alowance of .046 of a pound of available protein to i 

 pounds of milk of average quality yielded, is sufficient to maintain th< 

 flow, and by increasing or decreasing this allowance by .004 of a pound o 

 protein for every .5 of one per cent of increase or decrease in the test o 

 rhe milk, the ration will be adjusted to the needs of cows giving th< 

 various grades of milk. Milk testing 3.85 per cent fat is fixed as th< 

 standard average, and a cow giving that grade needs .046 of a pound o 

 available protein to each pound of milk she yields. 



Adjourned until 1:15 p. m. 



