238 POTATOES 



12. Storing Sweet Potatoes. If sweet potatoes are stored by dealers or 

 growers, study the different methods in use and formulate, if possible, any 

 tixed rule or method practiced by different ones. 



QUESTIONS 



1. In what ways do the varieties of Irish potatoes differ from each other? 



2. -Describe the soils best suited to the Irish potato, and tell what fertilizers 



are usually needed. 



3. Give directions regarding the preparation of soil and preparation of seed 



for planting. 



4. What are the common practices regarding methods of planting Irish pota- 



toes in your section? 



5. What kind of machines and what methods of cultivation are most prac- 



ticed in the potato growing districts nearest you? 



6. What are the two chief enemies which require the spraying of Irish pota- 



toes and what materials are used for them? 



7. Give methods of harvesting Irish potatoes. 



8. Mention some different types and varieties of sweet potatoes and compare 



them in qualities. 



10. What kinds of soil are best suited to the growing of sweet potatoes? 



11. Describe the special preparation of soil for sweet potatoes. How are the 

 plants propagated? 



12. Describe the setting of the field. 



13. What is the common practice regarding cultivation of sweet potatoes 



where you have seen it? 



14. When and how is the crop harvested? 



15. Give directions regarding the storage of sweet potatoes. 



16. What is said regarding control of black rot and stem rot? 



References. United States Farmers' Bulletins: 295, Potatoes and Other 

 Root Crops as Food; 324, Sweet Potatoes; 342, Potato Breeding; 365, Farm 

 Management in Northern Potato-Growing Sections; 386, Potato Culture on 

 Irrigated Farms of the West; 407, The Potato as a Truck Crop; 533, Good 

 Seed Potatoes and How to Produce Them; 544, Potato-tuber Diseases; 557, 

 The Potato Tuber Moth; 598, Storing and Marketing Sweet Potatoes. 



Cornell Bulletin: 350, Potato Scab and Sulphur Disinfection. R. I. Exp. 

 Sta., Bui. iii, Potatoes, Wash. Bui. 94, Potatoes, Test of Varieties. 



