262 



LLINOIS DAIRYMEN'S ASSOCIATION. 



Ration B. 



Digestible Nutrients. 

 Carbohy- 



Protein. drates. Fat, 



Lb. lb. lb. lb. 



Clover hay 15 1.02 5.37 .25 



Corn and cob meal 8 .35 4.80 .23 



Bran G .73 2.35 .16 



Total nutrients in ration t 2.10 12.52 .64 



Nutrients required for a 1,000 lb. 



cow giving 30 lb. 4% milk 2.10 13.48 .58 



The amount of protein, carbohydrates, and fat now cor- 

 respond closely with the nutrients required, for all practical pur- 

 poses. 



If one wishes to feed clover hay, corn silage, corn rneal, and 

 ground oats, he can make up a trial ration by taking 8 pounds of 

 clover hay, 40 pounds of silage, 4 pounds of corn meal, and 4 

 pounds of ground oats. The nutritive value of each of these feeds 

 can then be determined from the amount of digestible nutrients 

 in 100 poimds given in feeding tables. Taking the digestible 

 nutrients in the given amounts of each of these substances we 

 have the following trial ration : 



Ration C (Trial Ration.) 



Digestible Nutrients. 

 Carbohy- 



Protein. drates. Fat, 



Lb. lb. lb. lb. 



Clover hay 8 .54 2.86 .14 



Corn silage 40 .36 4.52 .28 



Corn meal 4 .31 2.67 .17 



Ground oats 4 .37 1.89 .17 



Total nutrients in ration 1.58 11.94 .76 



Nutrients required for a 1,000 lb. 



cow giving 30 lb. 4% milk 2.10 13.48 .58 



By comparing the total nutrients in this ration with the re- 

 quired nurtients for a cow producing 30 pounds of 4 per cent 

 milk, it is found that the ration is deficient in both protein and 

 carbohydrates, but needs a larger proportion of protein than of 



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