516 Bulletin 94^ 



Extra Fancy : All fruit failing to pass through a 15/16-inch mesh ; 

 Fancy: All fruit passing through a 15/16-inch mesh but 



failing to oass a 13/16-inch mesh; 

 Large: All fruit passing through a 13/16-inch mesh but 



failing to pass an 11/16-inch mesh. 

 Small: All fruit passing through an 11 /16-inch mesh, luit 



failing to pass a 9/16-inch mesh. 



AGE OF BEARING AND YIELD 

 A small crop may be expected the fourth year from planting; and a 

 yield of approximately one to one and one-half tons per acre the fifth 

 year. After that the yields should increase from year to year until 

 the trees are in full bearing, when the average production per acre 

 should be not less than five to six tons. A yield of four and one-half 

 tons per acre was secured some years ago at the Station Farm west 

 of Phoenix ; this was from ten-year-old trees of the Columella variety 

 set forty feet apart. Tlie percentage of oil in the fruit as well as the 

 yield increases as the trees become older. 



VARIETIES 



Varieties of olives differ in size, color, quality, and other charac- 

 teristics. A large number of varieties are suitable for oil, a less number 

 for green pickles, and still fewer for ripe pickles. A good ripe-pickle 

 variety must be well colored, firm, and of good size. 



A number of varieties have been tested by the Arizona Agricultural 

 Experiment Station. Some of these have meritorious qualities, but 

 none equals the Mission. Therefore, until a variety of large size 

 possessing the high qualities of the Mission is found, this old standard 

 sort must remain the leading commercial variety for ripe pickles. In 

 the meantime, the olive grower should use the best cultural practices 

 with the Mission variety, even resorting to thinning, in order to produce 

 fruit of large size. 



Following is a list of the varieties growing on the University 

 Campus: Nevadillo, Regalis, Altro Violacea, Mission, Pendulina. 

 Uvaria, Oblonga, Precox, Morinello. Rubra, Cayon. Manzanillo, 

 Frautoia, Razza, Grossia, Correggiola, and Columella. The trees were 

 planted April 1, 1895, making them* about twenty-six years old. The 

 first winter after planting they were killed back to the ground but 



