8 BULLETIN 1071, U. S. DEPARTMENT OF AGEICULTTJEE. 



Table 8. — Month of freshening in relation to average annual production and 



income per cow. 



Month of freshening. 



Number 



of 



cows. 



Milk 

 produc- 

 tion. 



Butterfat 

 produc- 

 tion. 



Gross 

 income. 



Income 

 over cost 

 of feed. 



January 



February 



March 



April 



May 



June 



July .- 



August 



September 



October 



November 



December 



Total and averages 



1,209 



1,185 



1,472 



1,047 



677 



460 



396 



472 



779 



1,016 



1,067 



1,090 



Pounds. 

 6,416 

 6,164 

 5,962 

 5,698 

 5,806 

 5,717 

 5,864 

 6,225 

 6,408 

 6,865 

 6,727 

 6,764 



Pounds. 

 256 

 250 

 241 

 231 

 232 

 224 

 233 

 250 

 259 

 274 

 271 

 268 



S137. 64 

 131.24 



129. 80 

 126. 55 

 123. 77 



123. 81 

 123. 06 

 132.54 

 137. 97 

 148. 33 

 144. 38 

 148.38 



S74. 98 

 71.43 

 72.51 

 70.21 

 67.65 

 65.61 

 63.93 

 69.77 

 72.91 

 79.04 

 77.10 

 81.01 



10, 870 



6,269 



252 



135. 37 



73.36 



The cows that freshened in September, October, November, De- 

 cember, and January averaged high in production of both milk and 



&£//?££:/? Or CO/T& 



Fig. 2. — Relation of butterfat production to month of freshening, 



butterfat. For each of thes^five groups the average butterfat pro- 

 duction was above 250 pounds, but for cows that freshened during 

 other months the average butterfat production never went above 

 250 pounds. The cows that freshened in April, May, June, and July 

 were lowest in average production of butterfat and those that fresh- 

 ened in July had the lowest average income over cost of feed. 



Figure 2 shows graphically the average production of butterfat 

 per cow according to month when cows freshened. 



Considering butterfat production alone, October freshening ranks 

 highest for the 64 associations, although November, December, Sep- 

 tember, and January are not far behind. The regularity with which 



