Bulletin No. 



138 



For fall growth potatoes are planted during August. In some 

 parts of southern Arizona they must be planted whole, or they 

 rot instead of sending up stems. For this purpose small ones 

 are used. When they are cut, the seed pieces are placed with the 

 eye upwards, by some growers, and covered lightly that they 

 may come up before decaying. The growth of tops is commonly 

 slender at this time of year, instead of stocky as during spring. 

 At best, the yield is usually light, especially in the warmer val- 

 leys. 



Frc. 5. Burpee's Extra Early potato; planted January 17; mature May 15; two weeks 

 earlier than Early Ross, and equally productive; two thirds natural size. 



Varieties. None but early varieties have time to make their 

 growth during the short season that exists. The Early Rose is 

 the one commonly planted, and at present is in the Salt River val- 

 ley the onl}' one that it is practicable to grow successfully. Bur- 

 pee's Extra Early, Triumph, and Early Andes yield equally well, 

 and are some earlier, but at present there is no suitable source of 

 a seed supply. Early Ohio is early, but does not yield so well. 



