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Nominate the 2015 Great American Tree

Everyone has a favorite tree. It’s a landmark to your community, has a compelling story, or makes a huge environmental contribution. It personifies perseverance or is a testament to history. It’s grand and noble or small and dignified. Whatever statement your favorite tree makes, nominate it - in the first annual Great American Tree Competition. More Info.

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Managing Change in Our Community Forests: a Toolkit for Action

Managing Change in Our Community Forests: a Toolkit for Action Oregon Community Trees Thursday, June 4, 2015 from 8:00 AM to 4:00 PM (PDT) Portland, OR Invasive pests, changing climate regimes and increased urban density will cause changes in our urban forests in the coming years. What tools and strategies can managers use today to help our community forests adapt? This one-day conference will provide participants with a toolkit full of possibilities, based on the most recent research in our…

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How many leaves on a tree?

Many think about leaves in the fall, but what about spring when trees come out of dormancy and have to bud out all those leaves. As for the number, I have seen estimates as high as 7 million and as low as 20K for a mature tree. My guess it is probably around 200K on a large mature tree.  Do you know a good source to measure the number of leaves.  My favorite was from Georgia Gardner Walter Reeves for the simplicity. Below are some sources. Do you have a better source? The photograph is from…

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Tree Video

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Dr. Coder Thanking Trees
i-Tree Design: An Applied Example
a Forest Year
QUICKLOOK: The Emerald Ash Borer
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John's Bowls
Urban Forests = Cleaner, Cooler Air

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