CHAPTER XXXVI 



WEEDS AND THEIR CONTROL 



Introduction. — Every progressive farmer is to-day fighting 

 the serious and persistent menace, weeds. The United States 

 government realizing the importance of the control or eradica- 

 tion has passed laws relating to certain practices which the 



Fig. 234. — Canada thistle, showing the flowering top of the plant and 

 the underground system ( X i ) • 



500 



