ECONOMIC PLANTS 



221 



mended that the entire field of plants shall be uprooted 

 and burned in the fall after the crop has been picked. 



Flax. It has been said that no other plant not 

 yielding food is so valuable to man as flax. It is highly 



FIG. 112. -Flax, grown for Seed (left-hand plot) and for Fiber (right-hand plot). 



valuable for the fibers of its inner bark, from which 

 linen cloth of varying degrees of fineness is made, and 

 for its seeds, which yield linseed oil, already spoken 

 of under Oil. Oil cake is extensively used as feed for 

 cattle, and linseed meal is used as a poultice. Flax 

 fiber is one of the materials out of which paper is made. 



