64 



Bulletin 173. 



Lot B : 



Grain mixture 8 to 10 pounds. 



Gluten feed 3 parts. 



Oat chop 3 parts. 



Corn meal , 1 part. 



Linseed oil meal. 1 part. 



Corn silage 35 to 45 pounds. 



Clover hay 4 to 10 pounds. 



Nutritive ratio 1:G 



Lot C : 



Grain mixture 8 to 10 pounds. 



Oat chop 4 parts. 



Corn meal 4 parts. 



Linseed oil meal 1 part. 



Corn silage 35 to 40 pounds. 



Timothy hay 4 to 8 pounds. 



Nutritive ratio ..... 1:9. 



Calculating each of these rations on the basis of 8 pounds of 

 grain, 8 pounds of hay and 40 pounds of silage, each cow would 

 receive the following number of pounds of digestible nutrients 

 per day : 



Lot A, narrow ration. . 

 Lot B, medium ration. 

 Lot C, wide ration. . . . 



Protein. 



2.90 

 2.25 

 1.60 



Carbobydrates. 



10.78 

 11.61 

 12.68 



Fat. 



1.09 

 .91 

 .75 



Nutritive 

 ratio. 



1:4.5 

 1:6.0 

 1:9.0 



Beginning with December 14, each cow received 5 pounds of 

 mangel-wurtzels per day in addition to the above rations. 



Table I contains the average record of consumption of food and 

 production of milk and fat for each of the three lots of cows 

 named above. The data given includes the weekly average con- 

 sumption of dry matter per head, the average daily consumption 

 per 1000 pounds live weight, the nutritive ration, the average weekly 

 yield of milk and fat and the average per cent of fat. 



