64 Weeds. 



or by other means, at any time during the 

 congenial season of growth, they at once 

 spring into vigorous Hfe. The means to 

 be taken in destroying weeds that are 

 annuals should be, first, to prevent them 

 from maturing their seeds ; and, second, to 

 adopt such modes of cultivation as will 

 most quickly force th.e seeds that are in the 

 soil into germination, so that they may 

 spring up and be destroyed. The means 

 best fitted to secure this quick germination 

 of the buried seeds of annuals are the 

 growing of cultivated crops and "autumn 

 cultivation." At all events, when the seeds 

 of annual weeds are kept from ripening 

 year after year, and when the agencies con- 

 cerned in their dissemination are effectu- 

 ally looked after and checkmated, the time 

 cannot fail to come when this class of weeds 

 will all be destroyed. 



Biennial weeds complete the cycle of 

 their existence in two years. Many of 

 them are characterized by a tap root, grow- 

 ing deep into the soil. During the first year 

 large quantities of starch are stored up in 

 this root, which is utilized the next year in 

 producing an abundance of seeds. The 

 burdock furnishes an excellent example ot 



