MctJwds of Eradication. 59 



(i) The persistent and careful study of 

 the habits of growth of all the various sorts 

 of weeds with which one's farm is infested, 

 so as to be able to deal with them in the 

 most rational way possible. 



(2) The modification (when necessary) 

 of the scheme of rotation that has been 

 adopted, so that such crops as allow the 

 seeds of the weeds which infest them to 

 ripen may, for a time, be omitted from the 

 rotation. 



(3) When certain methods of eradica- 

 tion have been fixed upon, the careful and 

 wise adaptation of these methods to such 

 conditions of soil and climate as are found 

 in the locality concerned. 



(4) The exercise of due care, when 

 seeds are purchased, to see that they are 

 perfectly pure, that is, perfectly free from 

 the seeds of weeds; and also the exercise 

 of due care with respect to such seeds as 

 are grown at home to see that they, too, 

 are perfectly free from weed seeds. 



(5) The exercise of due care to see that 

 the thrashing machine, especially when it 

 comes directly from a farm infested with 

 any form of noxious weed, is thoroughly 

 cleaned before it is used. 



