Distribution and Propagation. 41 



farm ; and some are entirely beyond his 

 control, as waters and winds. These vari- 

 ous means or agencies will now be consid- 

 ered in the order in which they have been 

 mentioned. 



I, Seed grain, grass seed, clover seed, 

 etc. By no other agency, perhaps, are 

 weeds so widely and so generally distributed 

 as by the grain seed, grass seed, and clover 

 seed used by the farmer, more especially 

 the two latter. Carrying facilities are now 

 so complete that seed intended for sowing 

 can be brought from great distances to be 

 sold in any market where there is a demand 

 for it. This is particularly true of the less 

 bulky and lighter sorts of seeds. Owing 

 to the ready means which are thus afforded 

 for obtaining supplies of these seeds, there 

 is a tendency in those districts where fair 

 yields are not commonly obtained to pur- 

 chase them from distant parts rather than 

 to raise them at home. The demand thus 

 sustained encourages the growth of the 

 various sorts of seeds in those centers that 

 are found most suitable for them. Unfor- 

 tunately, those centers which are generally 

 possessed of unusual fertility oftentimes 

 produce the seeds of hurtful weeds quite 



