REVIEW QUESTIONS 151 



4. What is " heading back," its purpose and how done? 



5. What trimming or pruning is required of nursery stock? How 



done? 



6. What insect and fungus troubles are liable to affect nursery 



trees? What are the dangers? 



7. What are the essentials of a good nursery spraying machine? 



8. How are trees counted before digging and the purpose of the 



count? 



9. Describe the process of tree digging and the various machines 



used. 



10. What is the pulling process? How is it done? 



11. How are nursery trees fumigated and what troubles is it sup- 



posed to control? 



12. Describe a modern tree storage shed. 



13. How are nursery trees graded? 



14. What are the principal grades and what do they stand for? 



15. What are the usual methods for selling trees? 



16. Describe the sub-agent and his methods. 



17. How are trees sold from catalogs? 



18. What are the essentials of a good catalog? 



19. Discuss the nursery jobber and his methods. 



20. Mention some of the essentials in the office routine of a nur- 



sery company. 



21. How are orders filled? What packages are used? 



22. What are the necessary conditions for shipping live trees? 



