EXERCISE 21 (Continued) ^ (57) 



5. From the results secured, what type of soil would you say would be most 



benefited by cultivation? 



6. Which soils would leach most? 



7. What effect does rolling have upon soil moisture? 



8. What effect does fall plowing or early spring plowing have upon soil 



moisture? 



9. Define gravitational water. What are its uses and when is it injurious? 



