INTRODUCTORY 



21 



THE CULTIVATOB 



implement that will cut the rootstocks, the small cuttings of 

 which may be exceedingly persistent in growth. 



WEED SEEDS IX COMMERCLA.L SEEDS AXD FEEDING STUFFS. 



Commercial seeds and feeding stuffs are fruitful sources 

 of weed introduction and distribution. Stable manure from 

 cities and towns is often polluted with weed seeds; but its 

 distribution is not so general as the seeds of clovers, grasses and 

 cereals or ground meal for feeding. 



Too much care cannot be taken to procure clean seed. An 

 additional cost of fifty cents per acre for seed known to be clean 

 is cheap insurance against losses caused by the introduction 

 of noxious weeds. Where possible, it is advisable to procure 

 seed from lands that are known to be free from noxious weeds. 

 Commercial seeds should be carefully examined and the kinds 

 and nature of any weed seeds included therein clearly under- 

 stood before J: hey are sown. Absolutely pure seeds are not 

 obtainable in quantity for commerce and many samples that 

 appear to be clean contain seeds of the most objectionable 

 weeds. Clover seeds foul with Foxtail are often less harmful 



