176 ELEMENTS OP AGRICULTURE 



rich soils well supplied with organic matter, wood's 

 mold being frequently used for the purpose. Warm 

 soils enable the crops to get an. early start in the 

 spring and so produce an early harvest. 



Questions 



1. Name three root crops grown for stock food. 2. Name 

 three other root crops grown for vegetables. 3. Are these 

 crops annuals, biennials or perennials? 4. How does the 

 enlarged root benefit the growth of the plant? 5. What 

 kind of soil do root crops require? 6. What kind of matter 

 do the leaves and tops of these plants contain? 7. Name 

 the two most important tuber crops. 8. Describe the roots 

 of the sweet potato. 9. How do they differ from the 

 root crops already mentioned? 10. What are the tubers of 

 the Irish potato? 11. Are these crops annuals, biennials or 

 perennials? 12. What kind of soil is best adapted to the 

 sweet potato? 13. May good crops of either sweet or Irish 

 potatoes be grown in a wet soil? 14. In what parts of this 

 country does tobacco grow? 15. How are the different 

 varieties of tobacco produced? 16. Why does the tobacco 

 crop exhaust the soil? 17. In what part of the country does 

 cotton grow? 18. Why is it that cotton lands soon become 

 exhausted? 19. What kinds of soil are best suited for 

 garden crops and small fruit? 



