TUBER CROP PROJECTS 223 



3. Describe the soil and climatic conditions in the United States 

 where sweet potatoes are grown most extensively. 

 L : 254. Fi : 21-24. 



3. Choosing varieties. — Varieties of sweet potatoes differ 

 greatly in the shape, color, and quality of the tubers. Some of 

 the most important varieties are Big-Stem Jersey, Yellow Jersey, 

 Southern Queen, Pumpkin Yam, Georgia Yam, Red Bermuda, 

 Florida, Pierson, Black Spanish, and Shanghai. The Big-Stem 

 Jersey is the most popular on the northern and eastern markets. 



1. What varieties of sweet potatoes do your neighbors grow ? 



2. What variety do you think you should grow? What are your 



reasons for selecting it ? 



3. What are the leading varieties grown in the United States and what 



are their chief characteristics ? 

 W-VG : 436^39. C : 431. Fi : 8-13. 



4. How do sweet potatoes differ in the character of the flesh f 



4. Obtaining seed. — Tubers of medium size are generally 

 preferred for seed. They should be free from disease and handled 

 with care to prevent bruising. Growers sometimes make selec- 

 tions of seed at harvest time. Two to four bushels of medium size 

 seed are required to make enough plants for an acre. When two 

 lots of plants are grown from the same seed, a bushel should pro- 

 duce 2000 to 2500 plants. 



1. What kind of seed should be chosen for the best results? 



W-VG : 440. 



2. How many bushels of seed are required for an acre? For 



your project ? W-VG : 440. 



