HORTICULTURE 



F. J. Crider, a. F. Kinnison, D. W. Albert 



For the past few years the Department of Horticulture 

 has concerned itself with the more fundamental phases of horti- 

 cultural investigation. An important part of this work has con- 

 sisted in establishing orchards and vineyards composed of the 

 leading adaptable varieties of fruit at all of the branch Experi- 

 ment Stations in the State. These plantings have now reached 

 the stage of development where they are beginning to yield 

 interesting and valuable data. The increasing number of in- 

 quiries for information based on sound experimental practices 

 shows the need for this work. The distinct natural advantages 

 for commercial fruit and vegetable culture found in Arizona 

 are coming more and more to be realized, as is manifested by 

 increased activities in these lines, carrying the compelling sug- 

 gestion that investigational work in horticulture must embrace 

 constantly broadening fields. 



The progress made in the work on projects with the gen- 

 eral subjects under investigation during the fiscal year ended 

 June 30, 1921, is given below: 



CITRUS FRUITS 



NEW PLANTINGS 



Five acres of oranges of the Washington Navel variety 

 were planted at Yuma Mesa Farm on August 4, making a total 

 of ten acres that was set during the summer of 1920. This 

 planting was enlarged on June 9, 1921, to include a collection 

 of twenty-eight different varieties. The trees were planted 

 "open rooted," and the temperature on the day they were set 

 reached a maximum of 106 degrees. In ten days from the 

 time of planting the trees had started into growth. 



Following is a list of the varieties used: Eureka, Lisbon, 

 Rialto Seedless, and Villa Franca lemons; Marsh, Foster, and 

 Duncan grapefruits; Malta Blood, Valencia, Washington Navel, 

 Mediterranean Sweet, Navelencia, Ruby Blood, Lue Gim Gong, 

 and Satsuma oranges; Dancy Willow-Leaved, King and Al- 

 gerian tangarines; Mexican Sweet, Rangpur, Thornless, and 

 Bearss Seedless limes; Sampson Tangelo; and Cedrola. 



The following varieties were planted at the Salt River Val- 

 ley Farm on April 29: Homasasses, Valencia, Thompson Im- 



