208 



ILLINOIS STATE DAIRYMEN'S ASSOCIATION 



breed and the heifer calves resulting from this union were also 

 kept for dairy purposes. A few of these heifers carrying 75% 

 of the blood of recognized dairy breeds have just freshened but 

 their records are not available for this preliminary report of the 

 work. 



Results 



Unfortunately, records of production and feed consumed 

 prior to the time the cows were brought to the college farm are 

 not available. Consequently it is impossible to compare the 

 records of the cows under their original environment and those 

 obtained under conditions such as a fairly well managed herd 

 would have. 



However, a comparison of successive lactation periods, after 

 coming to the farm, is of interest and in the following tables 

 the cows are divided into two classes : The two cows that came 

 to the farm at four years of age in table I and those advanced 

 in age in table II. 



Successive Lactation Periods of Scrub Cows 



In table I are shown the milk and fat records of cows Nos. 

 6 and 31 for seven successive lactation periods. As these cows 

 were about four years of age at the time of the first lactation 



Table 1 — Average Yearly Records of the Cows Nos. 6 and 31, That Came 

 to the College Farm at 4 Years of Age 





Milk 





Fat 









1? 





05& n^ 



-J fD t3 

 73 



CO 



>-! (T> n 



woo 



2 ^ 



« 

 2 



^a 





1— 0) fp 

 p fa P 





M M P 





0.0 



ft) 







03 2? 





W M 



d" 



"^ 



5-r 







^2, 





^0 ct> 



'^ 



3 



Cfi 





• ^ 







^B 

 ^ 





PB 



^ 



<-t- 





1 



3084.6 





149.24 





$13.93 



26c 



2 



3984.4 



29 



178.97 



' 19 



32.15 



18c 



3 



4618.1 



50 



217.79 



46 



31.68 



21c 



4 



4907.7 



59 



229.91 



54 



37.48 



19c 



5 



4224.0 



37 



197.59 



32 



31.80 



19c 



6 



1991.3 



^35 



84.76 



-50 



1.97 



34c 



7 



2862.5 



"8 



133.70 



--10 



18.95 



21c 



