72 STORRS AGRICULTURAL EXPERIMENT STATION. 
Although a shrinkage in production would naturally follow 
from advancement in period of lactation, the herds as a whole 
more than held their own when changed to the narrower ration 
from four to six weeks after the first test. The results are in 
accord with the best observations and experiments, in that so 
far as physiological effects are concerned narrow (nitrogenous ) 
rations give larger yields of both milk and butter than do wide 
(carbonaceous) rations. 
COST “GF THE RATIONS: 
In the majority of cases the total cost of the narrow ration 
was considerably less than that of the wide ration. Some 
nitrogenous grain feed like cotton seed, gluten, or linseed, was, 
in most cases, substituted in the second tests for a part of the 
wheat and corn feeds used in the first rations, in order to 
increase the nitrogenous matter. The total cost of the rations 
and the net cost after deducting the manurial value is shown 
in the summary table. ‘These show the total cost of feed and 
the net cost after deducting the manurial value, on the 
assumption that 85 per cent. of the nitrogen, phosphoric acid, 
and potash, of the fodders are obtainable in the manure and that 
they have the same value as in ordinary commercial fertilizers. 
The following tables give the cost of food to produce 100 
pounds of milk, and one pound of butter. 
Cost of Food to Produce roo Pounds of Milk. 













Tora. Cost or FEED. Net Cost or FEEpD.* 
HERD. ; 
Wide Ration. | Narrower | Wide Ration. ees 
Cents. Cents. 
1 ge a cae hark ag $1.47 $1.15 79 52 
Diy to - - - 1.00 1.03 53 50 
Cee! é = : 1.41 1.30 gI 73 
Doh - - - 1.0L 1:10 50 50 
Bare % z a 1.03 ag, 59 39 
Ps Se - - - 85 Kolyi 38 38 
Siac AG ies Sn es 1.05} -94t _ 43t 364 
Average, ~ - 1.12 : 1.05 59 48 
* Total cost less that of obtainable manure. + First ration. + Second ration. 
ee a, a 

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