82 PRODUCTIVE FARMING 



group them into annuals, biennials, and perennials. U.S. Far- 

 mers' Bulletin 28 will be of much help in the study of weeds. 

 Exercise. — Seed Collection. — Let the pupils bring to 

 school in the fall such weed seeds as they can find upon the 

 known weeds. These may be carried in small papers or old 

 envelopes on which the name of the plant is written. These 

 may be transferred to small bottles as in Fig. 14, or to holes 

 in a seed board made hke the one shown in Fig. 15. A col- 

 lection of farm and garden geeds should also be made for 

 the school to use. 



REVIEW. 



1. Tell of the value of sifting and fanning grain which is to be used 

 for seed. 



2. From which plants in a garden should the gardener save seeds ? 



3. Describe the ear-row method of improving corn. 



4. Describe the hill-row method of improving seed potatoes. 



5. Tell why weeds are so prevalent and give a remedy. 



6. Why should farm seeds be examined before they are purchased 

 or sown ? 



7. Tell how to analyze a sample of clover seed. 



8. Tell how to mount a sample of grass seed to study its value. 



9. Give a number of advantages from knowing the vitality of seeds. 



10. Describe the plate method of seed testing. 



11. Describe some other good method of testing seeds. 



12. Tell of some ways in which seeds are sometimes adulterated. 



13. What are immature seeds ? Why not plant such ? 



14. Tell how seeds should be stored. 



15. What are noxious weeds ? 



16. What are annuals ? biennials ? perennials ? 



17. Where are annual weeds most commonly found ? 



18. In what places are perennials most commonly found ? 



19. Name several annual weeds. 



20. Name several common biennial weeds. 



21. Name all the perennial weeds you can. 



22. Of what value is a collection of weed specimens in school ? 



23. Why should every one know the common weeds ? 



24. Would a collection of seeds properly labeled be of use in 

 school ? Why ? 



References. — U. S. Farmers' Bulletin 145, Carbon Bisulphid as an 

 Insecticide ; also Nos. 28, 86, 188, 194, 260, and 382. 



