International Society of Arboriculture -- Consumer Information
http://www.isa-arbor.com/consumer/consumer.html
Informative series of articles on selecting, planting and caring for trees.

Missouri Horticulture Publications
http://muextension.missouri.edu/xplor/agguides/hort/
Scroll down to the Trees section for some excellent articles on selecting, fertilizing, pruning and care of shade trees. Also has articles on fruit, flowers, house plants, lawns, landscaping, shrubs and vegetables.

The National Arbor Day Foundation
http://www.arborday.org/
Comprehensive site including an interactive tree identification guide and information on the foundation’s programs to further the cause of tree planting and environmental stewardship.

New Jersey Forest Service – Community Forestry
http://www.state.nj.us/dep/forestry/community/home.html
on the town site where we have narrowed the search for you.

US National Arboretum
http://www.usna.usda.gov/
A site providing comprehensive information on research and education pertaining to gardens and woodlands throughout the United States.

TreeLink: The Community Forestry Resource
http://www.treelink.org/
A site providing information, research, and networking for people working in urban and community forestry.

Shigo on Tree Systems
http://www.chesco.com/~treeman/SHIGO/index.html
Educational articles by Dr Alex Shigo – supposedly for the professional but very readable. Also lists various books, booklets, posters and videos on tree care.