REVIEW QUESTIONS 169 



authority to quarantine any state or section of the country 

 where dangerous outbreaks of insect pests or fungus troubles 

 may occur. This may not only affect interstate shipments 

 of nursery stock but shipments between different sections 

 of the same state. Such quarantines may be permanent 

 or temporary according to the judgment of the officials 

 of the Board. Wherever such acts are contemplated 

 public hearings are provided for where interested parties 

 may appear and give evidence concerning the subject of 

 the hearing. This serves as a check against hasty action 

 and gives all interested nurserymen an opportunity for 

 free discussion. 



REVIEW QUESTIONS 



1. Explain the meaning of " Pedigree Nursery Stock." 



2. Discuss the application of Pedigree Stock to nursery work. 



3. Explain " Double Working " of stock, its value and use. 



4. What is meant by " Influence of Stock over Cion"? 



5. State some known effects of Stock on Cion or Cion on 

 Stock. 



6. Give instances where the above is made use of in a commer- 

 cial way. 



7. Give the theory in explanation of the reciprocal influence 

 of Stock and Cion. 



8. Discuss hardiness in nursery stock and the extent to which 

 it may be influenced by climatic conditions. 



9. What relation does hardiness bear to the place where nur- 

 sery stock is purchased? 



10. What are Horticultutal Novelties? 



11. What should be the orchardists attitude toward novelties? 



12. To what extent do nursery companies aid in the improv- 

 ing of fruits? 



