62 Weeds. 



destruction which are described hi the fol- 

 lowing chapters. In fact, unless in our 

 management of the farm we pay tlie utmost 

 heed to these general principles and methods 

 of weed destruction, we can never hope to 

 be completely successful in our war with 

 weeds. As the writer has made it his habit 

 for many years to test the value of these 

 general principles and methods by con- 

 stantly putting them into practice, he will 

 here set down in specific directions, for the 

 benefit of his brother farmers in this most 

 important question of weed destruction, 

 such remarks as he thinks his experience 

 entitles him to make. 



7. Study tlieir habits of groivth. In the 

 war with weeds, we must study their hab- 

 its of growth, and adapt our methods of 

 fighting them to fit in with these habits. 

 Weeds, like other plants, are classified as 

 annuals, biennials, and perennials. 



Annuals, as their name implies, complete 

 the cycle of their existence in a single sea- 

 son, although in some instances they may 

 start growth in the fall, particularly in the 

 warmer sections. They are then called 

 ivinter annuals. Common examples of this 

 class are shepherd's purse, chickwccd and 



