Bui 53, Bureau of Plant Industry. U. S. Dept. of Agriculture 



PLATE IV. 



OREGON 



EXPLANATION 

 |Ji [] INTERIOR VALLEY REGION 



PLATEAU REGION 

 COLO.RIVERVALLEYREGION 

 DEATH VALLEVREGIO.N 

 SALTON BASIN REGION 



RELIEF MAP OF CALIFORNIA, SHOWING THE PRINCIPAL REGIONS 

 WHERE DATES CAN BE GROWN. 



