U. S. DEPARTMENT OF AGRICULTURE. 



BDRBAn OF SOILS— inWON WIITSET, Ciiet. 



220.^ 



/ 



SOIL SURVEY OF 

 THE MIDDLE GILA VALLEY AREA, 



ARIZONA. 



D 001 108 858 



BY 



E. C. ECK^IANN, In Charge, MARK BALDWIN, and 

 E. J. CARPENTER. 



MACY H. LAPHAM, Inspector, Western Division. 



[Advance Sheets— Field Operations of tlie Bureau of Soils, 1917.] 



UCLA SEL/Geology Collection 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



1920. 



