The University of Arizona
College of Agriculture and Life Sciences

Vice President and Dean
Eugene G. Sander

Vice Dean
Director, Agricultural Experiment Station
Colin Kaltenbach

Associate Dean
Director of Cooperative Extension
Jim Christenson

Associate Dean
Director of Academic Programs
David Cox

The College of Agriculture and Life Sciences includes the John and Doris Norton School of Family and Consumer Sciences, the School of Renewable Natural Resources, the Office of Arid Lands Studies, the Agricultural Experiment Station, Cooperative Extension, and the Office of Academic Programs.

The College is an Equal Opportunity Affirmative Action employer.

Arizona Agricultural Experiment
Station Research Report

Produced by
Educational Communications and
Technologies

Editor
Susan McGinley

Managing Editor
Robert Casler

Photo Editor
Joanne Littlefield

Graphic Designer
Maria-del-Carmen Aranguren

Director, Publication and Web
Robert Casler

Director, ECAT
David Cox

The Arizona Agricultural Experiment Station Research Report is a publication of the University of Arizona College of Agriculture and Life Sciences. Information in this report becomes public property upon publication and may be reprinted, provided no commercial endorsement is implied. Please credit authors, photographers, the publication and the University of Arizona. Any products, services or organizations mentioned, shown or indirectly implied in this publication do not imply endorsement by the University.