14 WEEDS OF FARM LAND 



germination for a long period and are ready to start into 

 growth when they are dug into the soil with the manure. 

 Little is known about the amount of heating that weed seeds 

 can withstand when buried in manure, but it is certain that under 

 the ordinary conditions of making and storing dung large 

 quantities of seeds escape destruction. If it can be avoided, 



FIG. 3. ORACHE (Atriplex patula). 



therefore, it is best riot to spread manure as soon as it is 

 received from any district known to be badly infested with 

 weeds. If the manure can be properly stored for some time, 

 there is a possibility that many of the seeds will rot and that 

 many others will take advantage of the genial warmth to start 

 germinating, only to perish from the adverse conditions for 

 plant life that exist within the heap. 



