THE VEGETABLE GARDEN 25 



REVIEW QUESTIONS 



1. What location and soil are best for early crops? 



2. What location and soil are best for late crops? 



3. Under what conditions will it pay to irrigate? 



4. When should the land be mulched? 



5. What is meant by cultivation? 



6. What is humus and how does it affect the soil? 



7. What is an acre inch of water and how many barrels does it 

 contain? 



8. When will it pay to pump water for irrigation? 



9. How may a good, small, cheap reservoir be made? 



10. What kind of land is best adapted to irrigation? 



11. Give six rules for applying water to land. 



12. What is meant by sub irrigation? 



13. What is meant by rotation of crops? 



14. Give six reasons for rotating crops. 



15. What crops improve the land on which they grow and why? 



16. How does the Skinner system differ from other methods of 

 irrigation? 



