474 Thirty-first Annual RiJport 



the highest yield and proved most resistant to spring frost. The 

 other varieties used were White Rose, BHss Triumph, Early Ohio, 

 Early Rose, and Irish Cobbler. 



Fertilizer and spraying experiments in cooperation with potato 

 growers in Coconino County were started this spring, but on ac- 

 count of a failure of the potato crop, due to drought, reliable data 

 could not be obtained. 



SWEET POTATOES 



Storage tests with sweet potatoes are continuing satisfactorily. 

 An adobe house designed and constructed so as to embody the 

 principles of successful sweet potato storage is proving a cheap 

 and efficient means of storage. It is believed that final data will 

 be secured on the subject next year. 



Interesting results are expected from a collection of forty 

 varieties of sweet potatoes being tested this season at the Yum-i 

 Date Orchard and Horticultural Station. 



MISCELLANEOUS 



In a large collection of strawberry varieties tested at the Yuma 

 Station the following showed distinctly superior qualities, con- 

 sidered from the standpoint of yield, quality, and resistance to heal : 

 Early Ozark, Klondyke, Gandy, and Arizona Everbearing. 



Nurser} stocks of citrus, grapes, figs, and olives are being pro- 

 pagated with success at the Yuma Station. 



The production of Bermuda onion seed has given evidence of 

 promise at the Yuma Station and will be made a subject of further 

 study. 



Landscai)e gardening plans have been prepared for the Salt 

 River Valley Experiment Farm, and some ornamental plantings 

 were made during the past spring. 



The orchard at the Cochise Dry-Farm has been considerably 

 enlarged, leading varieties of apple, peach, cherry, grape, curranv, 

 gooseberry, and blackberry being added. The trees were set during 

 March. 



A new greenhouse designed by the Horticultural Department 

 is being l)uilt on the University campus. It will be of material 

 value in the handling of station and class work in horticulture. 



Considerable time was required of the Horticulturist in the 

 general supervision of work on the Yuma Mesa, at the Tempe Date 

 Orchard, and at the Yuma Date Orchard and Horticultural Station. 

 It was also necessary for the members of the horticultural staff to 

 spend a considerable portion of their time in extension work i;i 

 horticulture. 



