Distribution and Propagation. 57 



by means of lateral root extension, it is 

 because we do not use the resources 

 which we have at command to pre- 

 vent this extension. The farmers who 

 tolerate either of these methods of weed 

 distribution will never have clean farms. 

 We sympathize with the man of scrip- 

 ture in whose fields, when he slept, 

 the enemy sowed tares; but he deserves no 

 sympathy who negligently allows weeds to 

 ripen their seeds upon his farm, or to prop- 

 agate themselves by means of root exten- 

 sion. Such a man is indififerent to his own 

 true interests, for he allows voracious 

 intruders from year to year to prey upon 

 the sources of his own prosperity. 



