ACKMO\JLEDGMENT 



The authors acknov/ledge the assistance rendered by 

 members of the Division of Irrigation of the Soil Conser- 

 vation Service, United States Department of Agriculture, 

 especially Paul A. Ewing, Irrigation Economist, who edited 

 the manuscript. 



The advice and assistance of Harold ConJiling, Deputy 

 State Engineer, is recognized. Credit for specific data is 

 indicated at appropriate places throughout the report to 

 individual investigators or agencies, the results of whose 

 investi^tions were pertinent to the authors' analyses. 



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