LETTER OF TRANSWITTAl 



Mr. Edward Hyatt, 

 State Engineer, 

 Sacramento, California. 



Dear Sir: 



Transmitted herewith for publication is a cooperative 

 report "Use of Water by Native Vegetation," 



The report, prepared by Arthur A. Young and Harry F. 

 Blaney, is a comprehensive presentation of available research 

 data dealing with the consumptive use of water by various non- 

 crop plants native to California and the Southwest in general. 

 Its analyses are of economic and practical importance in shap- 

 ing the effective conservation and use of water in this wide 

 region. 



The greater part of the Investigations on which the 

 report is largely based was supported, and the report was pre- 

 pared, under cooperative agreement between the Division of 

 Vater Resources of the California State Department of Public 

 Works and the Division of Irrigation of the Soil Conservation 

 Service, United States Department of Agriculture. 



Respectfully submitted, 



Chief, Division of Irrigation, 

 Soil Conservation Service, 

 United States Department of 

 Agriculture 



Berkeley, California, 

 July 31, 1942. 



