442 Tiiiki]i:Tii Annual Kkpokt 



OLERICULTURE 



Effort was made to maintain an all-the-year family garden at 

 each of the; sub-stations except the Tempe Date Orchard, where soil 

 conditions are not satisfactory for general gardening. 



Best results along this line were attained at the Yuma Date 

 Orchard and Horticultural Station where it was found possible to 

 produce vegetables throughout the entire winter as well as a few 

 during the hottest portion of summer. Among the less frequently 

 grown vegetables that are being tested are roselle, Chinese cabbage, 

 Chinese mustard, and chayote. 



IRISH POTATO 



During the year plantings of one of the standard varieties .of 

 potatoes, the Early White Rose, were made at intervals of everv 

 two weeks at the Yuma Date Orchard and Horticultural Station 

 to determine the best time of planting. The highest yield was from 

 plantings made the middle of January and the second highest yield 

 from plantings made the first of February. November and Decent 

 ber plantmgs were very promising until the plants were killed by 

 a cold spell of weather in January. 



Potatoes planted at Yuma during the latter part of the summer 

 were a failure, the seed having rotted in the ground due to high soil 

 temperature. However, the same variety, the Lookout Mountain, 

 at Tucson gave promising yields for the season. Table IX shows 

 the result of this test. 



TABLE IX. — LATE SUMMER PLANTINGS OF THE) LOOKOUT MOUNTAIN 

 VARIETY OF POTATO 



Planting date 



Average yield per hill , Yield per acre 



June 1 



July 6 



Augrst 1 . . . . 

 September 16 



.24 lb. I 3528 lbs. 



.33 lb. 3S57 lbs. 



.32 lb. 4704 lbs. 



.27 lb. 3969 lbs. 



A variety test with some of the leading varieties of Irish po- 

 tato was made at the Yuma Date Orchard and Horticultural Station. 

 The yields secured in this test are shown in Table X. All the varie- 

 ties were planted on the same date, February 5th. 



