Prevent Seeding. 91 



this work is to be done is a busy one ; and 

 (2) there is frequently too httle horse labor 

 available for the purpose, for the reason 

 that too little is kept on the farm. The 

 advantages of this method of destroying 

 weeds are so very important that it is abso- 

 lutely essential that much effort should be 

 made to secure them. It may be remarked 

 that when catch, crops are grown for turn- 

 ing under as green manure, the necessary 

 plowing after the harvest of the main crop, 

 and the plowing under of the green crop 

 for manure are much the same as would 

 be required as autumn cultivation for the 

 purpose mainly of destroying weeds, while 

 if the catch crop has been successful, there 

 is an increase in the fertility of the soil by 

 the application of the green manure. 



i^. Allozv no weed seeds to ripen. We 

 should never allow noxious weeds to ripen 

 their seeds, if it is at all in our power to 

 prevent their doing so. When the clean- 

 ing of a farm that is foul with weeds is first 

 undertaken, it may not always be possible 

 to hinder the ripening of the seeds of the 

 weeds that infest it, but the ripening may 

 usually be very largely prevented by modi- 

 fying the rotation for a time. When once 



