100 



ILLINOIS STATE DAIRYMEN'S ASSOCIATION 



TABLE 1. — Estimate value of good proved sires, based on actual rec- 

 ords of dams and daughters 



Number of sire 



Average butterfat 

 production per 

 cow 



Average 



gain of 



daughters 



over 



dams 



Number 



of 

 daughters 



Value of gain at 40 

 cents per pound 

 butterfat 



Amount of 

 money on 

 interest at 

 6 per cent 

 to earn as 





Dams 



Daugh- 

 ters 



For one 

 daughter 



For all 

 daughters 



much as 

 the gain of 

 the daughters 



1 



Pounds 

 347 

 254 

 256 

 185 

 156 

 250 



Pounds 

 500 

 350 

 351 



260 

 228 

 308 



Pounds 



153 



96 



95 



75 



7 



6 



5 



1 1 



$61.20 

 38.40 

 38.00 

 30.00 

 28.80 

 23.20 



$428.40 

 230.40 

 190.00 

 330.00 

 230.40 

 116.00 



$7,140.00 

 3,840.00 

 3,166.66 

 5,500.00 

 3,840.00 

 1,933.33 



4 



5 



6 



72 8 

 58 5 















The average production of the daughters of each sire 

 v^as multiplied by 10 to determine v^hat the total would be 

 for 10 daughters, but these sires may eventually have many 

 times that number of daughters. Figuring on the gains of 

 10 daughters for each sire the first sire earns 6 per cent 

 annually on $10,200; the second, 6 per cent on $6,400; and 

 the third, 6 per cent on $6,333. 



The completed tabulation shows that the average gain 

 of all the daughters of the 12 sires was 52 pounds of butter- 

 fat a year, or 520 pounds for 10 such daughters. At 40 cents 

 a pound the value of the increased production would amount 

 to $208 for the 10 daughters, or $2,080 if the sire had 100 

 daughters which averaged 52 pounds of butterfat more than 

 their dams. At 6 per cent it would require $34,667 to earn 

 $2,080 interest in a year. 



To be sure, since some of these bulls will prove unsat- 

 isfactory and the others will grow too old for service, all 

 will finally have to be replaced ; but long before this must 

 be done most of them will have earned many times their 

 original cost. Not only do these bulls raise the average pro- 

 duction of the daughters above the dams, but they also have 

 a tendency to raise the average level of the production of 

 their descendants over a period of many generations. Cer- 

 tainly, if there are any farm organizations that merit the 

 confidence of bankers, the cooperative bull association must 

 be very near the top of that list. 



