
A STUDY OF RATIONS FED TO MILCH COWS. was 7 
protein was increased by .3 pound for an increase of .15 pound 
in the yield of fat. In the cases of three herds this plan of feed- 
ng proved more profitable than the one of feeding a nearly unt- 
form ration to all the cows. 
TABLE 46. 
Summary of daily rations fed, and daily milk and butter yield. 


















ss DAILY RATION PER HEAD. i alan eee eae 
= g ; lb 1b 
"eo ~ a 6 3 100 iS. I : 
Da ces OWL re we : : P= Milk, Butter. 
mom, | FE clea (ese18) 218/28) 2s 7. 
te |\o|Polapal|e| ¢ © cm oa wea ae ed 
hw CS Hea > — ~ n n D 77) 
& Bl) vo|lrul| A | os o AY, © Se torah ga fo} 
Te co 4 ol PsA Cree =h REWER otal i oa Sholay aad AS a | Ce 
bse igane! ae SURE Vas o Ss 2) 8 ie 
z, Ae lige dion ghee 
Lbs. Pose Cate) 2 Cts; Cts, 1 bs: .bsiy $e PCt: |: Ce. ocr 
Pp § Ist test, 800 9 |(51/2+71/31990/5 .3/22.4/13.9 16,617 OL 535),.83 | 22,34 
: ua test, 53/2.92/30950/|4.7/20.4/11.1/16,2/1.03/1.26| 69| 20 | 11 
yay Test; i. 0 | 52/2.23/28800/6.0/19.5/12.0|13.9| .88)1.40| 86| 22 | 14 
eee o2c testa. | 75 54/2.37/27250|5.2/19.4/11.3/16.3] .98/1.19| 69| 20 | 12 
R Ist test, t Aly ASS I.49/27270/8.8/16.8}11.2/15.9] .84|1.06| 70| 20 | 13 
Pad test, 75 57\2.36/27400/5 .2/18.4/10.6/16.8] .96)1.09) 63 Ig | II 
S Ist test, : § 56/1.45|27290/9.1/18.6|12.8/13.5| .78/1.38] 95 | 24 | 16 
ey 2d test, 7 5% 58)1.98|26460/6.2/17.2/11.2/16.7/1.03/1.03| 67 | 17 | 11 

The experiments, as a whole, help to verify the earlier work of 
this Station, and point out the economy of feeding a larger pro- 
portion of protein than most farmers are in the habit of feeding. 
Rations supplying from 1.80 to 2.60 pounds of digestible protein 
per day, according to the yields of milk or of butter fat, have gen- 
erally proven more profitable than those furnishing less protein. 

* Total cost less value of obtainable manure. 
+ On the assumption that the amount of butter that can be made is equivalent to 
seven-sixths of the amount of butter fat produced. 
