10 CIRCULAR 558, U. S. DEPARTMENT OF AGRICULTURE 
FiaurE 5.—Seed of blue wild-rye (Elymus glaucus) before (A) and after (B) 
it was processed. The short, slender awns of this seed are easily removed by 
milling. 
Ficure 6.—The effect of processing seed of Siberian wild-rye (Elymus sibiricus). 
The long, slender, curved awns on untreated seed (A) make it impossible to 
handle the seed with ordinary machinery, whereas the processed seed (A) is 
easily planted. 
