DESCRIPTIVE MANUAL 



57 



The following suggestions for exterminating the weed are made 

 by Fletcher and Clark: "Let the plant exhaust its substance in 

 the production of a hay crop, which should be cut and removed as 

 soon as the head is formed and before it is in bloom. Plow shallow 

 and cultivate until the root-stocks have been brought to the surface 

 by implements that can be forced, after repeated applications, to the 

 full depth of the furrow. A disc is not satisfactory because the cut- 

 tings from the root-stocks are difficult to gather and they perpetuate 



Fig. 30-D. Distribution of Slender Wheat Grass. 



the growth, wherever transplanted. When brought to the surface the 

 root-stocks should be gathered and burnt or removed. This should 

 be done at once before the plant has had an opportunity to renew 

 its growth. For Manitoba, S. A. Bedford recommends plowing up 

 the couchgrass late in the spring and seeding at once to barley, three 

 bushels to the acre. ' ' 



Chemical Composition.- — Various chemical analyses have been 

 made of quack grass. The following were reported by Weems from 

 material grown in Iowa. 



NATURAL CONDITION 



WATER FREE SUBSTANCE. 



