ACRT Institute of Arboriculture and Urban Forestry
Training for the line clearing, tree care and urban forestry industry.
Arboricultural Information Exchange.
The AIE site (UK) has news, links and collections of resources for arboriculture.
Arborist Site Discussion Group
A loose affiliation of volunteer tree working professionals that discuss the needs of tree care within the industry and answer questions for the general public.
The California Arborists Association
Membership information, details and timetables of activities and workshops.
Shigo on Tree Systems
A set of articles by Dr. Shigo on arboriculture, and on the growth of garden trees.
European Arboricultural Council
A forum for arboricultural organizations in Europe to liaise on research and education in tree establishment and improvement of working practices.
Great Southern Tree Conference
Educational event devoted to tree selection, landscape, production, marketing and management issues in the Southern United States. Due to take place in December 2005.
International Society of Arboriculture
Arboriculture On-line was developed to assist tree care professionals in developing and maintaining effective plant health care programs. Includes an extensive collection of urban forestry links.
Mid-Atlantic Chapter, International Society of Arboriculture
information and links on trees and their care (arboriculture); resources for arborists
Bag Snaggers
A tool for arborists and urban tree pruners for removing plastic bags and other debris from trees.
National Arborist Association
The trade association of commercial tree care businesses. Site has information (for consumers and for professionals) and links on tree care practices and standards.
Arboricultural Association
Promotes care and knowledge of trees in the UK. Details of activities, members, and journal.
Wildtrees
Includes views on conservation of native trees for the environment.
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