4-t. 



REFERENCES ^^"^^i^^d 



prevent the production of seed, and seeding the roadsides 

 heavily to grass and clover will keep down weeds and pre- 

 vent their spread to adjoining fields. Common roadside 

 weeds are ragweed, kinghead, sunflowers, marsh elder, cockle- 

 bur, bull thistle, Jimson weed, velvetweed, and sweet clover. 



LABORATORY AND FIELD EXERCISES 



1. Let each member of the class bring in five weeds. Learn the 

 names of these weeds and describe their most important characteristics. 

 This study should include their habit of growth, duration and nature 

 of root system, time of seeding, seed habits, and characters which make 

 eradication easy or difficult. 



2. Make a stud}^ of weed seeds, so that each member of the class 

 will learn to recognize the more common weed seeds in various kinds 

 of field seeds. Samples of grain and forage-crop seeds brought in or 

 prepared, containing weed seeds, may be inspected and the weed seed 

 separated and identified. Many of the experiment stations put up 

 cases containing small samples of the more common weed seeds, which 

 may be obtained at small cost and used for purposes of identification. 



3. If small vials or cases can be provided, each pupil might make a 

 collection of the seeds of the most common weeds of the \acinity. This 

 exercise will be of much value in identifying weed seeds in the seeds 

 of field crops. 



REFERENCES 



Cyclopedia of American Agriculture, Vol. II, Bailey.. 



Farm Weeds of Canada, Clark. 



Common Weeds of the Farm, Long. 



Weeds of the Farm and Garden, Pammel. 



Weeds and How to Eradicate Them, Shaw. 



Manual of Weeds, Georgia. 



Farmers' Bul'itliis: 



279. A Method of Eradicating Johnson Grass. 



382. The Adulteration of Forage-Plant Seeds. 



428. Testing Farm Seeds in the Home and in the Rural School. 



610. Wild Onion: Methods of Eradication. 



660. Weeds: How to Control Them. 



678. Eradication of Ferns from Pasture Lands in the Eastern 

 United States. 



833. Methods of Controlling or Eradicating Wild Oats in the 

 Hard Spring Wheat Area. 



