22 ILLINOIS STATE DAIRYMEN'S ASSOCIATION 



In Table 7 the seasons are ranked with reference to 

 the relation of date of freshening to income over cost of 

 feed per cow. 



TABLE 7. — Seasons ranked according to relation of date of freshening 

 to income over cost of feed. 



Number of times ranked 

 Season of freshening First Second Third Fourth 



Spring 9 8 21 26 



Summer 8 10 17 27 



Fall 30 24 7 3 



Winter 17 23 18 6 



The table shows the number of times each of the four 

 seasons ranked first, second, third and fourth on income 

 over cost of feed. Fall ranked first 30 times and fourth 

 only 3 times. Winter ranked first 17 times and fourth only 

 6 times. Spring ranked first 9 times and fourth 26 times, 

 while summer ranked first 8 times and fourth 27 times. 



Influence of Month of Freshening. 



Table 8 shows the relation between month of freshen- 

 ing and milk production, butterfat production, gross in- 

 come, and income over cost of feed of the same cows previ- 

 ously discussed under seasonal influences. 



TABLE 8. — Month of freshening in relation to average annual produc- 

 tion and income per cow. 



Month of freshening No. of cows Milk production 



Butterfat production Gross income 



Income over cost of feed 



Pounds Pounds 



January 1,209 6,416 256 $137.64 $74.98 



February 1,185 6,164 250 131.24 71.43 



March 1,472 5,962 241 129.80 72.51 



April 1,047 5,698 231 126.55 70.21 



May 677 5,806 232 123.77 67.65 



June 460 5,717 224 123.81 65.61 



July 396 5,864 233 123.06 63.93 



August 472 6,225 250 132.54 69.77 



September 779 6,408 259 137.97 72.91 



October 1,016 6,865 274 148.33 79.04 



November , 1,067 6,727 271 144.38 77.10 



December 1,090 6,764 268 148.38 81.01 



Total and averages 10,870 6,269 252 135.37 73.36 



