100 



Feeds and Feeding. 



Exam/pie Table 0, th&wmg the digestibility in feeding stuffs considered 

 under Tables A and B. 



Table A shows that com stover contains 3. 8 pounds of protein 

 and oat straw 4 pounds; 45 per cent, of the protein in stover, and 

 only 30 per cent, of that in straw, are digestible; consequently 100 

 pounds of average com stover contain 1.7 pounds of digestible 

 protein, while the same weight of oat straw contains only 1.2 

 pounds. Thus it is shown that although oat straw contains more 

 total protein than corn stover, the latter has more digestible pro- 

 tein. In digestible protein clover hay stands in strong contrast 

 with oat straw, — 100 pounds of the former containing 6.8 pounds 

 against 1.2 pounds for the straw. Corn contains 66.7 pounds of 

 digestible carbohydrates per hundred weight, while com stover 

 contains 32.4 pounds, or one-half as much. 



132. Nutritive ratio. — This expression, not heretofore used, is 

 common with the student of feeding problems and should be 

 understood by all, since it is helpful in studying different feeding 

 substances. By '' nutritive ratio " is meant the ratio which exists 

 between the amount of the digestible protein in a given feeding 

 stuff and the amount of the digestible carbohydrates and ether 

 extract it contains. It is ascertained in the following manner: 

 The amount of digestible ether extract is multiplied by 2.4, 

 because ether extract is considered as having this heat value com- 



