60 FIELD OPERATIONS OF THE BUREAU OF SOILS, 1910. 



The soils of the Ked Bhiff area are separated into 28 types, 2 of 

 Avhich are iionagricuhural. The 26 agricultural types are classified 

 into 9 series. 



The Redding series, consisting of two types, covers extensive areas. 

 The soils are rather poorly adapted to dry farming. The Redding 

 loam is the most extensive t^'pe. These soils are confined to the area 

 west of the Sacramento River. 



The Corning series, also of the west-side section, includes two types. 

 The series is poorly adapted to dry farming. 



The Tehama series, including three types, is found west of the river. 

 These soils are dry farmed to grain to a limited extent. They possess 

 gi'eat possibilities for development under irrigation. 



Tlie Kirkwood series is represented by a single type, the silty clay 

 adobe. It gives moderate yields of grain under the dry-farming 

 system. AVith water it will be found a useful soil for a variety of 

 crops. 



The ISIaywood series, comprising five types, is better adapted to dry 

 farming than the series previously mentioned. They will be very 

 valuable soils whenever irrigation is supplied. 



The Elder series comprises three types. These are alluvial soils and 

 are among the most fertile in the area. 



The Tuscan soils are practically nonagricultural. Two types oc- 

 cur, occupying great areas on the east side of the valley. The soils 

 are very shallow and underlain by impenetrable beds of cemented 

 gravel and volcanic tuff. 



The Vina series, consisting of four types, lies on the east side of the 

 Sacramento. Its soils are brownish in color and for the most part 

 rather friable. The soils are alluvial and prevailingly deep. Some 

 of the t3q:)es are among the best soils of the area. 



The Sacramento series, with four tj^pes, occupies the alluvial bot- 

 toms of the Sacramento River. The soils are deep and friable and 

 of high ngricultural value. 



Irrigation is practiced in several localities in the area, principally 

 on the east side of the river. The perennial streams there yield a 

 veiy valuable flow of water. Some pumping is done along the stream 

 ways and in the vicinity of Corning. The Sacramento bottoms are 

 subject to periodic floods, which can only be remedied by extensive 

 Avoi'ks of storage and conti'ol. Other soils of the area are remarkably 

 well drained. 



No alkali is found. 



In-igation development must precede intensive farming. This can 

 ])ii fully achieved only by works of a comprehensive scope. 



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