Technical Information Sheets


The following ten Technical Information Sheets, developed by Helen Stone and Dr. James Downer, address key topics relevant to arborists both within the WCISA region and beyond. Each sheet offers valuable insights and guidance on issues that matter to tree care professionals, providing expert knowledge and practical tips for a wide audience.

Click on the titles below to download each PDF or download the complete set here.

2. Maximizing Benefits of Trees in Hot Climates

3. Caring for Old Native Oaks

4. Planting and Early Care of Trees

5. Improving Soil Conditions Around Existing Trees

6. Managing Infrastructure Conflicts with Trees

7. Maintaining Palm Trees

8. Diagnosing and Rectifying Salt Toxicity

9. Responsible Wood Waste Management

10. Trees, Water and Irrigation


New Resources in Development!

Thanks to your generous donations through The Britton Fund, we are proud to support Dr. Linda Chalker-Scott as she produces ten new Web-based Technical Information Sheets for your personal and professional use. Each TIS shall be 2-3 pages in length and include informative text, color photographs and line drawings as appropriate. A list of additional readings, with web site addresses, is to be included. The information will be particularly beneficial to arborists and tree-care professionals practicing in California, Hawaii, Arizona, and Nevada. Dr. Chalker Scott has extensive experience in researching and writing peer-reviewed, science-based Extension fact sheets. Check back soon for these valuable resources! 


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