A STUDY OF RATIONS FED TO MILCH COWS. ES 
of hay, 6.5 pounds of corn stover, and 7 pounds of mixed grain 
feeds. This ration supplied about 1.8 pounds of digestible pro- 
tein per day, and had a nutritive ratio of 1:6.6. 
One group of four cows received only this basal ration. An- 
other group of four cows received the basal ration and for each 
cow an additional feeding of 1 pound of protein mixture, in- 
creasing the digestible protein to 2.1 pounds per day. ‘The 
single cow in the third group received the basal ration and 2 
pounds of protein mixture, supplying 2.3 pounds of digestible 
protein per day. 
A comparison of the results with the groups of cows fed ac- 
cording to the yields of butter fat in the second test and those 
with the same groups having an average ration in the first test 
is shown in the following table. For the whole herd the cost 
of the ration averaged 18.6 cents in the first test and 17.2 cents 
in the second. ‘The average daily milk flow in the first test 
was 13.5 pounds and in the second test 16.7 pounds, while the 
average daily yield of butter was .78 pounds in the first test 
and 1.03 in the second. ‘The average cost of producing 100 
pounds of milk was 35 cents less and the cost of a pound of 
butter 7 cents less in the second test than in the first test. 
TABLE 45. 
Summarized results with Herd S; tests Nos. 56 and 58. 
[First test Feb. 12-24, I900. Second test March 12-24, 1900. ] 



| DIGESTIBLE NUTRIENTS |Av. DAILY 

















| AND FUEL VALUE. YIELD. ae g 
7 aes: 
a ° ae) 
meager ins og ee ated *e 
Sem e Tea re to pea 
TN le Jellies ein oka ven = a Ma (= oe od 
Ay Om = te ~Q O » rs 
a en ee 2 | 8 
Z i 
Group A, 4 cows: Pips. LOS lbs; Cal, (ors) T,.bs.f Lbs. Ctsatr py Cts, 
Ist test, - - - |1,45|.46/12.18)27290/9. 1/11.3| .69/§8.6/1.65|27.0 
2d test, - - - |1.81|.47/10.83/25490|6.6/14.2} .88)17.6|/1.24)20.0 
Group B, 4 cows: 
Ist test, - - - |1.45|.46/12.18/27290|/9.1/14.4| .81/18.6/1.29/23.0 
oditest - a= “ - |2,06|.49|II.31/26940|6.0]17.7|1.09/16.5| .93|15.1 
Group C, I cow: 
Ist test, - - - |1.45|.46|12.18/27290\9.1/18.6/1.09/18.6|1 .00/17.1 
2d test, - - - |2.31/.52/11.79/28420)5 .6/22.9/1.39)18.7| .82/13.4 
Average of herd, 9 cows: 
Ist test, - - - |1.45).46)12.18/27290/9.1)18.5| .7818.6)1.38/23.8 
2d test, - - - 1.98) .48)11.15)26460/6.2/16.7\1.03/17.2/1.03/16.7 


