274 



SOIL PHYSICS AND MANAGEMENT 



producing well and requiring a less amount of water than other 

 cereals. After an application of 7.5 inches of water little increase 

 was obtained with more. The barley produced under irrigation is 

 of better quality than that produced on dry land. 



FIQ. 125. 



FIG. 126. 



Fio. 125. Mallin Ranch, Salt River Project, Arizona. 

 FIG. 126. Alfalfa field. Yuma Project, Arizona. 



)U. S. Reel a 

 j Servic 



Corn produces more dry matter in proportion to the water 

 applied than almost any other crop. Tt is not yet grown exten- 

 sively under irrigation, but its area is increasing, especially in 

 regions where stock raising is a prominent industry. Tt has a 



