RELATION OF PRODUCTION TO INCOME FROM COWS. 9 
Table 3. — Relation of butterfat production to cost of feed when the product was 
sold as butterfat. 
Number 
of cows. 
Average 
butterfat 
produc- 
tion. 
Average cost of feed. 
Group No. 
Rough- 
age. 
Grain. 
Total. 
1 
4 
43 
600 
2.305 
4,310 
4, 748 
3,385 
1, 635 
652 
214 
79 
27 
8 
3 
1 
Pounds. 
23 
58 
109 
154 
202 
251 
298 
347 
396 
446 
493 
543 
600 
642 
708 
S29. 36 
30.85 
28.08 
29.61 
31.54 
33.44 
34.26 
35.27 
34.70 
37.27 
39.12 
36.30 
40.23 
41.41 
45.08 
S10. 62 
7.12 
7.62 
10.94 
15.73 
20.34 
25.02 
28.91 
34.65 
38.88 
38.52 
45.69 
50.55 
82.72 
51.87 
S39. 98 
2 
37.97 
3 
35. 70 
4 
40. 55 
5 
47.27 
6 
53. 78 
7 
59.28 
8 
64.18 
9 
69.35 
10 
76.15 
11 
77.64 
12 
81.99 
13 
90.78 
14 
124. 13 
15 
96.95 
Total 
18,014 
248 
32. 75 20. 1 2 
52.87 
These figures show only a moderate rise in cost of roughage as 
butterfat production increases, but they show a very rapid rise in cost 
of grain. The comparatively small difference in the cost of roughage 
per cow for the different groups may have been due partly to the feed- 
ing of the same quantity of roughage to all cows in the same herd, 
regardless of production. The increased cost of grain, however, 
was very regular as production increased. This was always true when 
the number of records in the group was great enough to furnish a fair 
average. Evidently many of the members of cow-testing associations 
Table 4. — Relation of butterfat production to returns for $1 expended for' 
feed and to feed cost per pound of butterfat where the product was sold as 
butterfat. 
Group No. 
Number 
of cows. 
Average 
butterfat 
produc- 
tion. 
Average 
returns 
for SI ex- 
pended 
for feed. 
Average 
feed cost 
per 
pound of 
butterfat 
1 
4 
43 
600 
• 2,305 
4,310 
4,748 
3,385 
1,635 
652 
214 
79 
27 
8 
3 
1 
Pounds. 
23 
58 
109 
SO. 22 
.63 
1. 35 
SI. 758 
2 
.648 
3 
.323 
4 
154 1. 69 
202 i 1.90 
251 2. 08 
.264 
5 
.238 
6 
.214 
7 
298 
347 
396 
446 
493 
543 
600 
642 
708 
2.24 
2.40 
2.52 
2.64 
2.74 
2.64 
2.74 
2.21 
2.12 
.199 
8 
.185 
9 
.175 
10 
.171 
11 
.157 
12 
.151 
13... 
.151 
14 
.193 
15 
.137 
Total.... 
18,014 
248 
2.09 
.213 
91234' 
