COMPOSITION OF ANIMALS AND OF FEEDING STUFFS 73 



and leaves. They include hay, straw and other forms of for- 

 age either fresh, ensiled or dried. Chemically, they are char- 

 acterized by their relatively high percentage of crude fiber, 

 which, however, naturally varies within quite wide limits. 

 As compared with the concentrates they are bulky feeds and 

 contain a larger proportion of difficultly soluble ingredients. 



Roots and tubers. These feeding stuffs contain a large per- 

 centage of water, resembling in this respect the fresh or ensiled 

 roughages. Their dry matter, on the other hand, resembles 

 that of the concentrates in containing relatively little crude 

 fiber and a large proportion of ingredients which are easily 

 soluble. They might be briefly characterized as dilute con- 

 centrates. 



