Cambial Electrical Resistance does not Assess Vitality of Individual Sweet Gum Trees    (View PDF)

J. Clark, R. Kjelgran, J. Hushagen and J. Fiore

Abstract: Cambial electrical resistance (CER) was assessed over a year-long period, using the Shigometer, for 109 sweetgum trees (Liquidambarstyraciflua) planted along streets in Seattle, Washington. CER decreased through the spring, reached a minimum in summer, increased through the fall and was maximal in mid-winter. The seasonal maximum was 200- 600% greater than the summer minimum. CER measurements could not be related to growth parameters such as seasonal shoot increment and diameter growth.

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https://doi.org/10.48044/jauf.1992.001