572 NUTRITION OF FARM ANIMALS 



feeding stuffs may be variously grouped for different purposes, 

 but the following scheme, although not strictly consistent, 

 may serve the purpose of this discussion. 



Classification of feeding stuffs 



Roughages, or coarse fodders. 

 Dried 



Grasses 



Legumes 



Straws 

 Fresh 



Grasses 



Legumes 

 Silage 



Roots and tubers 

 Concentrates 



Farm products 



Cereal grains 



Leguminous grains 



Oil seeds 



Dairy products 

 By-products 



By-products of milling 



By-products of fermentation industries 



By-products of oil extraction 



By-products of starch and glucose manufacture 



By-products of sugar manufacture 



By-products of the packing house 



The following characterization of these various classes of 

 feeding stuffs is reproduced without material change from an 

 earlier article by the writer. 1 



i. ROUGHAGES, OR COARSE FODDERS 



678. General characters. The roughages are charac- 

 terized chemically by a relatively large percentage of crude 

 fiber, which forms the framework of the plant. They usually 

 do not contain very much protein, although in some this ingre- 

 dient shows a fairly high percentage. The proportion of crude 



1 Bailey's Cyclopedia of American Agriculture, 1908, Vol. Ill, pp. 58-92. 



