320 



ILLINOIS STATE DAIRYMEN'S ASSOCIATION. 



There is some waste in carbohydrate, but this cannot be 

 prevented with the crops grown in this rotation, and it is in 

 keeping with the practice on many of our dairy farms during 

 the winter. The acreage in crops per cow for the winter six 

 months will then be as follows : 



TABLE 8. — Pounds and Acreage of Crops for Winter Six Months. 



FEED 





Pounds 



Pounds 



Acres 



Acres 5 1 



Acres 



Surplus or 







fed 



per cow 



per cow 



cows 



available 



shortage 



Corn Stover 





. 12 



2196 



.55 



28.05 



30.3 



2.25 (bedding) 



Clover hay . 





8 



1464 



.3 



15.3 



15.43 



.13 



Clover & timothy 















hay 





5.5 



1006 



.25 



12.75 



13.15 



.40 



Corn meal . 





9.5 



1738 



.56 



28.76 



30.3 



1.54 



Ground oats 



re 



1 



183 



.11 



5.61 



5.3 



— .31 " 



Total acres 













quired for wint< 



3r 













six months 









1.23 



62.73 







As shown in the tables, it requires 1.37 acres to support a 

 cow during the summer six months and 1.23 acres during the 

 winter six months, or 2.6 acres to support a cow a year, and 

 134.1 acres will support a herd of 51 cows. 



A herd of this size would require one bull, and an average 

 of 7.1 heifers must be raised eaJ.i year to replenish the herd. 

 There could Lhen be supported by this system 42.9 milc.i cows 

 producing an average of 5500 pounds of milk per year, or a total 

 cf 235,950 pounds for the farm averaging 1475 pounds of milk 

 per acre. 



SYSTEM NO. 3, 54 COWS, 2025 POUNDS MILK PER ACRE. 



The rotation of crops raised in this system are corn, corn, 

 corn, oats, clover, pasture, pasture, with alfalfa in the rotation 

 once in eight years, giving 57 acres to corn, 19 acres each to 

 oats, clover and alfalfa, and 38 acres to pasture, with an addi- 

 tional 19 acres, corn ground, sown to rye for pasture. 



