Hello, First off I saw a master gardener article in the Salem Statesman Journal this morning and I want to thank you for all the services provided by the OSU Extension service. My question is: Is there a reference or clues to tell what trees are strong compartmentalizers and which species are weak compartmentalizers? I have a mature southern magnolia (weak) and mature a tricolor European Beech (probably strong) both needing pruning. Thank you!
The web address below is to a Forest Service bulletin (paste the address in your browser and click on the pdf) written by Dr. Alex Shigo, who pioneered the concept. It should pretty much tell you all there is to know on this topic.