8 BULLETIN 1071, U. S. DEPARTMENT OF AGRICULTURE. 
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 
$137. 64 
131.24 
129. 80 
126. 55 
123. 77 
123.81 
123. 06 
132.54 
137.97 
148.33 
144.38 
148. 38 
174.93 
71.43 
72.51 
70.21 
67.65 
65.01 
63.93 
69.77 
72.91 
79.04 
77.10 
81.01 
10,870 
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 
$ P ^ 
I S | 
Fig. 2. — Relation of butterfat production to month of freshening, 
butterfat. For each of these 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 
