Eugene M. KupfermanExtension horticulturist, Washington State University Tree Fruit Research and Extension Center, 1100 N. Western Avenue, Wenatchee, WA 98801.
James F. ThompsonExtension agricultural engineer, Department of Biological and Agricultural Engineering, University of California, Davis, CA 95616.
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Joseph A. Grant
Joseph A. GrantFarm advisor, University of California Cooperative Extension, 420 S. Wilson Way, Stockton, CA 95205.
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Eugene M. Kupferman
Eugene M. KupfermanExtension horticulturist, Washington State University Tree Fruit Research and Extension Center, 1100 N. Western Avenue, Wenatchee, WA 98801.
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Jerry Knutson
Jerry KnutsonDevelopment engineer, Department of Biological and Agricultural Engineering, University of California, Davis, CA 95616.
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