You can contact your local county Extension office http://www.uwex.edu/ces/cty/. The Dane County Tree board is affiliated with the Dane County Extension Office and tree care information is available through Lisa Johnson, the Dane County UW-Extension Horticulture Educator.
For further information, the International Society of Arboriculture has an informative website that covers the following topics:
- What does my tree need and why does it need these?
- Before Tree Buying and Planting
- Proper Tree Care Techniques
- Pruning Your Trees
- Tree Hazards and Treatments