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Phone: +1.678.367.0981
Fax: +1.240.547.1795

Mailing Address

International Society of Arboriculture
PO Box 191
Annapolis Junction, MD 20701
United States

Physical Address

International Society of Arboriculture
270 Peachtree St NW, Suite 1900
Atlanta, GA 30303
United States

Order Delays Due to Physical Inventory

Due to ISA's annual physical inventory, orders placed between
2 p.m. EDT, Thursday, 20 June 2019, and 11:59 p.m. EDT, Friday 28 June 2019, will not ship until the week of 1 July 2019

Please plan your ordering accordingly.

We will resume regular turnaround times
1 July 2019.

Thank your for your patience.

Questions? Please call the customer service team at (678) 367-0981.

    Climbers' CornerTree Academy

    Sapwood and Buttress root loss and the impact on tree stability.


    This presentation with discuss research results from two studies that were conducted, in part, at the ISA sponsored Tree Biomechanics weeks in Ohio in 2010 and 2013. The first study is of sapwood removal and tree stability. It was found that the impact of sapwood removal in independent of tree species and is about twice as important as heartwood loss. This study was conducted in conjunction with Dr. Brian Kane.
    The second study was of buttress root removal. The results were not as clean cut as the sapwood results, but showed a direct relationship between root removal and stability. After three years, large buttress roots removed from mature red maples were starting to decay regardless of wound treatment applied. Stability of the tree retested three years after the initial root cuts had increased/decreased as compared with the initial tests. A model of root stability developed by Dr. Ken James, Stewart Greenberger and Tom Smiley at the Biomechanics week will be presented and discussed.


    Dr. Tom Smiley is an arboricultural researcher at the Bartlett Tree Research Laboratories and adjunct professor at Clemson University.

    Climbers' CornerTree Academy

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