PRINCIPLES OF AGRICULTURAL CHEMISTRY 



Fig. 65. Distribution of alkali in soils near Tempe, Arizona less than 

 25 per cent., 25 to 50 per cent, and over 50 per cent. 



Fig. 66. Distance to standing water in soils near Tempe, Arizona less 

 than 10 feet, 10 to 20, 20 to 50 feet. Compare Fig. 65. Bureau of Soils. 



