QUESTIONS 389 



9. Seeds in Molasses Feeds. Wash several samples of molasses feeds in 

 a little water in glass dishes or plates. Then pour off the water, and when dry 

 examine with a lens for weed seeds. 



10. Weed Seeds in Field Seeds. Obtain samples of grass seed and clover 

 seed and make studies with a hand lens to determine the percentage of weed 

 seed in each case. 



11. Fighting Noxious Weeds. Find a place where some persistent per- 

 ennials are present Canada thistle, Johnson grass, quack grass, or wild onion. 

 Apply some of the special methods suggested in this chapter and note the 

 results, 



12. Percentage of Weeds in Hay. Examine samples of hay in the market 

 or in hay mows and stacks. Determine the percentage of weeds present in 

 them. 



13. Weed Seeds in Hay Mow. From the floor of a hay mow obtain a 

 handful of seeds shattered from the hay. After sifting to remove the coarse 

 chaff, examine with a lens to determine the percentage of weed seeds present. 



14. Seeds in Barnyard Manure. Take a sample of well rotted compost 

 which is about a year old. Take another sample from a manure pile not over 

 a month old. Spread these samples in a box of soil under conditions favorable 

 for germination. Compare the weed growth from each. 



QUESTIONS 



1. Define the terms, weeds and noxious weeds. Give examples of each. 



2. Define the terms annual, biennial and perennial, with relation to weeds, 



and give examples. 



3. Give a classification of weeds with reference to their places of growth, 



with examples of each. 



4. What are the chief losses due to weeds? 



5. What are some of the benefits of weeds? 



6. Describe the distribution of weed seeds, by natural methods. 



7. By commercial operations. 



8. What farm practices are likely to spread weed seeds? 



9. Give general directions for the control of annual weeds. 



10. Mention some biennial weeds and tell how to control them. 



11. Explain what kind of rotation will best control perennials. 



12. Suggest all the methods you can for fighting Canada thistle. 



13. Same for Johnson grass. 



14. Same for quack grass. 



15. Why are wild onions and garlic so obnoxious? 



16. How may they be controlled? 



17. Give the principles of weed control by spraying. 



18. Why should roadsides and fence rows be kept free from weeds? 



19. Give eleven principles of weed control. 



References. United States Farmers' Bulletins: 28, Weeds and How to 

 Kill Them; 86, Thirty Poisonous Plants of the U. S.; 188, Weeds Used in 

 Medicine; 279, A Method of Eradicating Johnson Grass; 306, Dodder in 

 Relation to Farm Seeds; 334, Vitality of Weed Seeds in Manure; 368, The 

 Eradication of Birdweed, or Wild Morning-glory; 380, The Loco-weed Dis- 

 ease; 428, Testing Farm Seeds in the Home and in the Rural School; 464, 

 The Eradication of Quack-grass; 531, Larkspur, or "Poison-Weed;" 545, 

 Controlling Canada Thistle; 610, Wild Onion: Methods of Eradication. 

 Cornell Circular 9, Orange Hawkweed or Paintbrush. R. !I. Exp. Sta. 

 Bui. 133, Weeds, their Eradication and Control. A Manual of Weeds, 

 Georgia, Macmillan Co., N. Y. Weeds of the Farm and Garden, Pammel^ 

 Orange Judd Co., N. Y. 



