18 
BULLETIN 1069, IT. S. DEPARTMENT OF AGRICULTURE. 
of milk a year returned about 50 cents more from a dollar's worth of 
feed than was returned by the cows that averaged 6,000 pounds of 
milk a year. 
Figure 10 shows the relation of milk production to feed cost per 
100 pounds of milk. 
As milk production increased from Groups 1 to 9 the feed cost per 
100 pounds of milk decreased very rapidly at first and more slowly 
$2.40 
Z.20 
Z.20 
Z.IO 
\ Z.OO 
^ 1.90 
$ f.SO 
| K70 
,.so 
^ L30 
W f.OO 
.90 
SO 
1500 3000 4500 6OO0 7SOO 9000 10500 /ZOOO 35000 
POUNP5 OF M/LK PEP COW 
Fig. 10.— Relation of milk production to feed cost per 100 pounds of milk. 
us production reached a high level. At current prices for feed the 
feed cost for each group would vary from the figures given, but 
recent records show that the direction of the curve would not be 
greatly changed. 
The foregoing evidence, based on cow-testing-association records, 
shows definitely the greater earning power of high-producing cows 
