Arizona Agricultural Experiment Station 473 



and soil conditions in sections of the State that appear to offer 

 promise in the matter of "dry-farm" fruit growing. Striking evi- 

 dence of the adaptability of certain un-irrigated localities to fruit 

 was observed in Pima and Santa Cruz counties east of the Santa 

 Rita Range at an elevation of approximately 4500 feet. In places 

 where the soil is deep and fertile, the apple, peach, and grape do 

 well, making a strong, steady growth and bearing good crops. A 

 more detailed study will be made of this and other sections of the 

 State where the rainfall is relatively high. 



IIORTICULTL'RAL PLANT INTRODUCTIONS 

 A rather large number of untried fruits, vegetables, and orna- 

 menial ])lants that show promise of being of economic value in 

 Arizona are being tested. Some oi these plants are being grown in 

 regular orchard form, such as the white sapote, jujube, feijoa, 

 and guava, while others are being held in the nursery row, mostly 

 in the introduction garden at Yuma, to observe their behavior. 

 The following is a list of plants imder investigation: Chayota cdulis, 

 Casimiroa cduUs, Jnhac chiensis, Morns alba, Jiibae atlantica, Persea 

 amcricana, Eriobotrya japonica, Psidium guajava, AcJiras capotci, 

 Hovenia dnlcis, ZizipUns jujnba, Musa sapient ium, Peiojoa superba, 

 Peijoa choiceana, Shcphcrdia argcntea, Citrnlhis vulgaris. Uclianthc- 

 mnm chavnaecistiis, Ananas sativus, Diospyros cbcnaster, Annona muri- 

 cata, Citrus sinensis, Achradelpha mammosa, Chrysophyllum cainito. 

 Citrus nobilis, Diospyros kaki, Brassica pckinensis, Annona squamosa, 

 Annona chcnuiolia, Mimusors zcyhcri. Aniygdalus dav.idiana, Aspara- 

 gus acutifolius, Trichosanthcs qninquangulata, DoUchos lablab, Tro- 

 paeolnm tuberosum, Arachis hypogaca. Citrus IVebberii, Cucmnis melo, 

 Garcinia iiiangoslana. Primus saliciiuj, Cucurbita Hcifolia, Aleurites 

 Fordii. 



IRISH POTATOES 

 A striking instance of the unreliability of seed potatoes pro- 

 duced in warmer districts of the State and held in ordinary 

 storage, developed in a test at the Yuma Date Orchard and Hor- 

 ticultural Station during the present season. In a planting con- 

 sisting of six leading varieties, produced the previous spring, a 

 complete failure resulted. The potatoes were kept for a period of 

 six and one-half months from the date of harvest to planting, 

 spread out thinly under an open shed. Although a good stand 

 was secured, the plants were lacking in vigor, and tubers failed 

 to develop properly. 



In comparative tests at the University Farm at Tucson, the 

 Peach Blow variety from seed produced in Coconino County gave 



