Miscellaneous Soils. 159 



Walla "Walla loam. — This type consists of a very sticky brown or 

 black sandy luam, or loam, with a depth of 3 feet, underlain by a 

 sandy loam similar to the subsoil of the Yakima sandy loam. In 

 places this subsoil from 3 feet to 6 feet may be a sticky, yellow 

 plastic sandy loam, but in most cases below 3 feet the soil is an 

 ordinary sandy loam. Occupies the very high, steep hills in the 

 eastern part of the district mapped. Is especially adapted to 

 wheat and barley, giving very large yields of both. 



Soil (3) 



Subsoil (3). 



Acres. 

 Walla Walla, Wash 23, 360 



Glendale loess. — Silt 6 feet or more in depth, typical loess tex- 

 ture. Level plain, forming low divide between Salt River and 

 Agua Fria River, Arizona. Formed by wash from Cave Creek. 

 Generally well drained and free from alkali. Adapted to grain 

 and alfalfa; lighter phases to fruit growing. 



1 



Soil (7) 3 



Subsoil (2) 3 



Acres. 

 Salt River Valley, Ariz 52, 040 



Santiago silt loam. — The soil is a dense, heavy, silt loam resem- 

 bling adobe, 2 feet in depth, very sticky when Avet, underlain by 

 sand, tine sand, or fine sandy loam. Lower delta plains and river 

 terraces. Derivation from modern alluvium, often being deposited 

 at present during flood season. When well drained and free from 

 alkali this soil is adapted to fruit, celery, and sugar beets. It is 

 dry-farmed to wheat to some extent, and as occurring in the 

 Salinas Valley is considered a most valuable soil. 



Soil (12) 



Subsoil (3) 



Acres. 



Los Angeles, Cal •. . . . 39, 360 



Lower Arkansas Valley, Colo.. 37,760 



Acres. 



San Gabriel, Cal 5, 220 



Santa Ana, Cal 14, 349 



Lower Salinas Valley, Cal 14, 120 i Yuma, Ariz 3. 76:. 



