THE ROOT 79 



Practical Questions 



1. Which is better to succeed a crop of turnips on the same land, hay 

 or carrots? (81.) 



2. Write out what you think would be a good rotation for four or 

 five successive crops based on the forms of the roots. 



3. Study the following rotations and give your opinion about them, 

 on the same principle. Suggest any improvements that may occur to 

 you, and give a reason for the change. Beets, barley, clover, wheat; 

 cotton, oats, peas, corn; oats, melons, turnips; cotton, oats, corn and 

 peas mixed, melons ; cotton, hay, corn, peas. 



4. Give three good reasons in favor of a rotation over a single-crop 

 system. (24, 60, 62, 81.) 



5. Which will require deeper tillage, a bed of carrots or one of straw- 

 berries? (81.) 



6. Explain why some plants keep green and fresh when the surface 

 of the soil is dry, while others wilt or die. (81, 89.) 



7. Which will better withstand drought, a crop of alfalfa or one of 

 Indian corn? Why? (81.) 



8. Which will interfere less with the trees if planted in an orchard, 

 beets or onions ? (81.) 



9. Ought a crop of hemp and tobacco to succeed each other on the 

 same land? (81, 89.) 



10. Why does a gardener manure a grass plot by scattering the ferti- 

 lizer on the surface, while he digs around the roses and lilacs and 'deposits 

 it under ground ? (81.) 



11. Do the adventitious roots of such climbers as ivy and trumpet vine 

 draw any nourishment from the objects to which they cling? (83-88.) 



12. How can you tell ? 



13. Do partial dependents of this kind injure trees by climbing upon 

 them; and if so, how? (87,88.) 



14. What is the use of the aerial roots of the scuppernong grape ? (88.) 



15. Is the resurrection fern (Polypodium incanum), that grows on tree 

 trunks in our Southern States, a parasite or an air plant? (87.) 



16. On what plants in your neighborhood does mistletoe grow most 

 abundantly ? Dodder ? 



17. Is mistletoe injurious to the host? (85.) 



18. Name some plants that are propagated mainly, or solely, by roots 

 and cuttings. 



19. Where do aerial roots get their nourishment? (88.) 



20. Would they be of any use to a plant in a very cold or dry climate ? 



21. Where should manure be placed to benefit a tree or shrub with 

 wide-spreading roots? (66, 89.) 



