THE AUTHORS 



JAMES L. CLAYTON has served as Research Soil Scientist 

 with the Intermountain Station since 1967. He received 

 his B.S, and M.S. degrees in soil science from the 

 University of California at Berkeley. 



CHESTER E, JENSEN is Principal Statistician for the Inter- 

 mountain Forest and Range Experiment Station. Pre- 

 viously, he held the same position at the Northeastern 

 and Central States Forest Experiment Stations. Mr. 

 Jensen, who holds a master of forestry degree from 

 Michigan State University, received his training in 

 graduate statistics at Iowa State University. 



