10 
BULLETIN 1069, U. S. DEPARTMENT OF AGRICULTURE. 
are feeding concentrates intelligently, according to known production. 
That, however, is not at all a general practice outside of the cow-test- 
ing- associations. 
RETURNS FOR $1 EXPENDED FOR FEED. 
The figures in Table 4, also taken from the same tabulation as those 
in Table 2. show the relation of butterfat production to returns for $1 
expended for feed, and to feed cost per pound of butterfat. 
# ' 260 
26 O 
\ 
2.20 
2.00 
/SO 
A60 
A40 
A20 
too 
.eo 
.<so 
/to 
.20 
o 
) 
/ 
/ 
/ 
50 AOO /SO 200 2SO 300 JSO 400 450 500 
POU/VPS Of SUTTEtf/HT PER COW 
Fig. 5. — Relation between butterfat production per cow and the returns from $1 expended 
for feed. 
The returns for $1 expended for feed increased quite regularly, 
and the feed cost per pound of butterfat decreased quite regularly 
