270 IRISH POTATOES 



5. Compare with yields in foreign countries. 



6. Where are wild potatoes found? When first cultivated in Europe? 



7. Describe a potato seed ball; a potato tuber. 



8. Name the principal characters used in classifying potatoes 



9. How is color of sprouts determined? 



10. Name the principal groups of potatoes. 



11. Which are generally early varieties? 



12. Name the principal groups grown in different regions of the United 



States. 



13. Describe a good market type of potato. 



14. Describe the structure and composition of a potato tuber. 



15. Describe favorable climatic conditions for potatoes. Where are such 



conditions found in the United States? 



16. Describe effect of hot weather on degeneration of the potato. 



17. State advantages generally credited to light soils for potatoes. 



18. State the present practice in regard to the use of fertilizers with, 



fertilizer for grass or grain crops. 



19. Why is less fertilizer used where potatoes are grown in rotation? 



20. State value of lime for potatoes and precautions in using it. 



21. Where are the potatoes generally grown in the rotation? 



