A STUDY OF RATIONS FED TO MILCH COWS. PSG 
also added to the grain feeds used, and the proportions of Buf- 
falo gluten feed and provender were slightly increased. The 
average basal ration for each cow in the herd consisted of 6 to 
7 pounds of hay, about 2 pounds of corn fodder, 29 to 31 pounds 
of corn silage, and about 7.5 pounds of mixed grain feeds. 
This ration supplied about 2.1 pounds of digestible protein per 
day, and had a nutritive ratio of 1:5.1. 
One group of eight cows were given only this basal ration. 
One group of six cows received the basal ration and in addition 
I pound of protein mixture for each cow, increasing the digest- 
ible protein to 2.4 pounds per day; and another group of four 
cows received 2 pounds of protein mixture in addition to the 
basal ration, making the total digestible protein for each cow 
in this group 2.8 pounds per day. 
TABLE 44. 
Summarized results with Herd R, tests Nos. 55 and 57. 
[First test Jan. 30-Feb. 10, 1900. Second test March I-12, I900.] 


| 
DIGESTIBLE NUTRIENTS |Av. DAILY] 











4]. 
AND FUEL VALUE. VIELD2 Wa. mo uv 
: —' Wels ee er 
i fe) ~ 129) 
qi .¥ z é peal ks = = 
elelee1 Se 12 ea ele) ee 
I=) s3| 3 /¢)/41a]s1$ 14 
seeps By Ah ees 
7, ie) 
Group A, 8 cows: Lbs.|I,bs| Lbs. | Cal. | 1; | Lbs.| Lbs.) Cts.| $ | Cts. 
ist test, - - - {1.49|.54/11.95/27270/8.8/13.8] .68)16.8)1.22/24.7 
2d test, 3 - - |2.09].61/10.59/26160/5.7/13.8| .75|17.4)1.26/23.2 
Group B, 6 cows: | | 
Ist test, - - - |1.49).54|11.95|27270/8.8|14.2) .g1/16.8)1.18|18.5 
2d test, - - =9|2.42|.67/10.09/27210|5 .0/15.4\1 .03\18. 3/5 19/1738 
Group C, 4 cows: | | 
Ist test, - - - |1.49}.54/11.95/27270|8 .8|22.5|1.05|16.8| .75|16.0 
2d test, - - - |2,82).77|11.66/30190/4.7/24.9/1.26/20.4| .82|10.2 
Average of herd, 18 cows: | 
Ist test, - - - |1.49).54/11.95)27270/8.8/15.9) .84/16.8)1.06/20.0 
2d test, - -  - |%.86).67)10.86/27400/5.2/16.8| .9618.4'1.09/19.2 
The results of the tests are summarized in Table 44. By 
comparing the cost of the rations fed, and the values of the 
products obtained, in the groups which were fed different 
rations in the second test with those in the same groups fed 
uniform rations in the first test, the relative economy of the 
different rations may be seen. ‘The average yield of milk in 
