224 



THE MONTHLY WU.ETTN. 



practically prevent the production of weed seeds and yet have the yield 

 of grain materially increased. This increase of yield in the grain is 

 broughl about by the elimination of the contest between the weeds and 

 the grain, allowing the grain, at once, after spraying, to get the full 

 benefit of the lighl and air and to take charge of the ground. 



"The chemical spray can be used to advantage along roadsides, in 

 meadow lands, lawns and waste places where it will prevent the produc- 

 tion of weed seeds and give the native and wild grasses an opportunity 



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Fig. 53. — Sam.- view as in Fig. 52, taken after the spraying. Note the 

 withered leaves <>!' the mustard plants and the growth of the grain. 

 April 1, 1!H 7. (Original.) 



to gain possession of the ground. It is a well-known fact that where 

 the weeds are kept down on the roadsides the grasses soon sod over the 

 shallow ditches and waste places. The peculiarity of the chemical spray 

 method is that all grasses and grains are so constituted as to withstand 

 the spray without great injury, while the worst types of weeds, except- 

 ing only those which belong to the grass family and a few types of 

 weeds which possess waxy or water-resisting surface, are attacked and 

 destroyed by the solutions." 



