ILLINOIS STATE DAIRYMEN'S ASSOCIATION. 



37 



above maintenance for each pound of milk the cow will give, and that 

 by increasing or decreasing the amount of protein .004 pounds for each. 

 .5 pounds increase or decrease of butter fat in the milk, will meet the re- 

 quirements — allowing, 7 pounds protein for maintenance for a 1000 pound 

 cow. 



Briefly stated, the figures require one pound protein for 22 1-5 pounds 

 standard milk or each pound of butter produced counting 1-6 over-run 

 for the churn. Then we have it 1.7 pounds digestible protein for a 1000 

 pound cow, giving 22 1-5 pounds of milk per day, testing 3.85 per cent fat, 

 or, making 1 pound of butter, 2.7 pounds protein for 2 pounds butter per 

 day, etc. 



Taking the next day's feed on ihe chart, which is SO pounds clover 

 pasture, we have 2.45 pounds protein, enough for a 650 pound cow to make 

 2 pounds of butter per day and hold her flesh, or 1% pounds butter for a 

 1000 pound cow. 



The next, clover hay, 20 pounds, 1.31 pounds protein, less .7 for main- 

 tenance for 1000 pound cow, leaves only .61 pounds butter per day. 

 Twenty pounds soy bean hay, 2.15 pounds protein, 1.45 pounds butter 

 per day, as against .61 pounds butter in clover hay and .98 pounds on 60 

 pounds Timothy pasture above maintenance. 



These are deductions from Prof Haeckers Bulletin No. 71 and Farm 

 Bulletin No. 22, and our dairy herd confirm them by our records of feeds, 

 milk and butter. 



We do not claim that every cow should have 2.50 pounds protein per 

 day when in milk, or that she needs or can use 10 to 15 pounds earborhy- 

 drates and V 2 to 1 pound fat in making milk. But we do claim that a cow- 

 produces the most economically when fed to her capacity of digestion 

 and assimilation for milk or meat. Feeding beyond that is wasteful and 

 dangerous to the health and life of the animal. Feeding a fresh milk cow 

 less protein than she is putting in her milk is simply carrying off her 

 structure in the pail, no matter how much excess of carbohydrates and 

 fat she gets. She may store up fat from the starch and fat in a wide ra- 



