i8o Weeds. 



lowing modes of dealing with it will be 

 found successful, except in season of unu- 

 sually heavy rainfall. 



/. After-harvest and autumn cultivation, 

 folloivcd by spring cultivation and a cul- 

 tivated crop. After harvest, plow the 

 infested fields lightly, and then harrow with 

 the ordinary harrow — if necessary, using 

 also the spring-tooth cultivator to shake 

 the roots of the grass free from the soil. 

 Then draw the roots into light windrows 

 with the horse rake, and, when they are 

 dry enough, burn them. If the weather 

 should not be dry enough for burning 

 them, the root-stocks may be carted into 

 a compost heap. Repeat the operation a 

 second time and even a third time the same 

 autumn if the weather will admit of it, 

 plowing the ground more deeply eacli time 

 in order to bring up fresh root-stocks. In 

 no case, however, should the disturbing 

 work go on in wet weather. When the 

 late autumn arrives, rib the land by turn- 

 ing two furrows together from opposite 

 directions, or plow the land so that the 

 largest possible amount of surface shall be 

 exposed to the action of the frost in win- 

 ter. The frost has the effect (i) of kill- 



