_ New York AcricunturaL EXxPERmEnt STation. 365 
i By this arrangement of the periods during which roots and 
silage. were fed, the average time from calving was about equal 
_ for the time each of these foods were fed. 
; _ The grain fed was a mixture of two parts ground oats, two 
, a old process linseed meal, and one part wheat middlings. 
_ There were ten days or more allowed for each period. Milk 
_was set separately for churning only from the last seven milkings. 
_ The cows were weighed at the same time per day on three of the 
j days for which the milk was separately set. 
; 
| 
: 
The unregistered Jersey cows, fed for this comparison aad to 
show differences which farmers may expect from cows raised 
together and fed alike in their own herds, were young and fresh 
at the time of beginning this feeding. They are here considered 
together, but are tabulated separately that the difference in daily 
production of milk and butter may be noted. Probability of this 
difference occurring in every herd indicates and suggests the 
] necessity for test comparisons in every milking herd. 
Both sets of rations are reasonably near the standard. The 
& ratio of rations containing roots was rather narrower than the 
standard ; that of those containing silage was wider than the 
average. The cost was 2.8 cents less with silage than with roots 
; when both were calculated at the same price per ton. 
_ The average yield of milk was .48 pound more with the 
tay rations, but the actual yields of butter when averaged 
“were as near equal as we could expect to have obtained 
from duplicates. The setting of milk in the third trial was 
different from the other trials and in all probability this difference 
‘diminished the yield of butter. (See note.) Adding this to the 
small difference found in the table and allowing the butter to 
have been equal in quality and worth twenty-five cents per pound, 
here is a difference of three and a quarter cents a day per cow. 
“When the saving in ration is added to this increased production 
of butter, the advantage from using the silage ration is increased 
to 6.03 cents per day. We believe this difference can be 
' widened in practice by the production of equally as good 
silage at less than half the price which we have set on it for this 
calculation. 
