Educators

Jim is coauthor of four books including A Photographic Guide to the Evaluation of Hazard Trees in Urban Areas (2nd Ed., 1992, International Society of Arboriculture), and Arboriculture:  Integrated Management of Landscape Trees, Shrubs and Vines (4th Ed., 2004, Prentice Hall). He has presented […]

Dr. Watson is the Senior Research Scientist at Morton Arboretum in Illinois.
Research Interests
The central interest of the urban tree root research program is to understand how to keep trees healthy in urban landscapes by maintaining a healthy balance between the crown and the root […]

Frank Rinn, inventor of the RESISTOGRAPH® and ARBOTOM® is world famous as an instructor on tree inspection and can help to make you a more expert arborist. Frank owns RINNTECH, a company that develops equipment for dendrochronology, tree and timber inspection since 1988.
Frank invented […]