NEW FEEDING FOR MILCH COWS 167 



starch equivalent of 18-3 and containing 3-9 digestible 

 protein, which is near enough to the standard. 



Another method by which the feeding value and 

 protein contents of the ration could be increased, 

 without purchasing foreign feeding stuffs, would be by 

 substituting more vetch or clover hay in place of an 

 equal weight of meadow hay, and using home-grown 

 grain as concentrates. Example : — 



Ration 4 



Total . . . 3-98 18-55 



To take a further illustration of the " comparative 

 principle." It is recommended in the Board of 

 Agriculture leaflet No. 79 to feed a 2 gals, per day 

 cow on the following daily ration : — 



Ration 5 



Total . . .1*95 11*94 



The above ration is recommended for an arable 

 farm, where straw is abundant. The following con- 

 tinuous-cropping ration, which also contains straw, 

 would have practically the same starch equivalent but 

 would be richer in digestible protein, being in addition 

 compounded entirely from home-grown food : — 



