December 2002 ISA CEU article, Tree Risk Assessment & Tree Mechanics by Ed Hayes.

Urban Tree Risk Management: A Community Guide to Program Design and Implementation; U.S. Forest Service, 2003

Useful Diagnostic Equipment for Tree Risk Assessment:

ML Resistograph,

Picus sonic tomograph,

Air Spade,

Tree Radar (roots),

Many other useful publications are available at the ISA and TCIA bookstores. Please find those links below.


Tree Care Industry Association:

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