TY - JOUR T1 - Cambial Electrical Resistance Does Not Assess Vitality of Individual Sweet Gum Trees JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 1 LP - 5 DO - 10.48044/jauf.1992.001 VL - 18 IS - 1 AU - J. Clark AU - R. Kjelgran AU - J. Hushagen AU - J. Fiore Y1 - 1992/01/01 UR - http://auf.isa-arbor.com/content/18/1/1.abstract N2 - 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 200600% greater than the summer minimum. CER measurements could not be related to growth parameters such as seasonal shoot increment and diameter growth. ER -