CONTENTS. 



Page. 

 Soil Srm-EY of the Middle Gila Valley Akea, Arizona, By E. C. 



EcKMAN, In Charge, Mark Baldwin, and E. J. Carpenter 5 



Description of tlie area 5 



Climate 8 



Agriculture 11 



Soils 16 



Pinal gravelly sandy loam 19 



Mohave sandy loam 20 



Mohave fine sandy loam 21 



McClellan loam 22 



McClellan clay loam 24 



Gila fine sand ^ 25 



Gila silty clay loam 26 



Pima clay 28 



Rough stony land 29 



Riverwash _. 29 



Irrigation 30 



Drainage 31 



Alkali : 32 



Summary 35 



ILLUSTRATIONS. 



PLATES. 



Page. 

 Plate I. Fig. 1. — View overlooking desert soils grouped in the Mohave 



series. Fig. 2. — Alfalfa on Mohave sandy loam, near Casa 



Grande 16 



II. Fig. 1. — View in Gila River bottoms near Florence. Fig. 2. — 



Alfalfa on Gila silty clay loam, near Florence 16 



colored plate. 



Plate A. Alkali map. Middle Gila Valley sheet 32 



FIGLTIE. 



I'iG. 1. Sketch map showing location of the Middle Gila Valley Area, 



Arizona 5 



MAP. 



Soil map, Middle Gila Valley sheet, Arizona. 



3 



