Several years ago, Richard Harris retired from the University of California at Davis and he asked my partner, Nelda Matheny, and I if we could be co-authors on the arboriculture book. I got the unenviable job of re-writing the introductory chapter. Idecided that what we really needed to do was introduce arboriculture/tree care to our audience. We needed to set the stage for tree care. To do that, I decided to use a phrase called guiding principles, a series of ideas that reflect what we do each day.
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