What does that mean?

How do you do it?

     You mitigate hazards by managing old and new trees with practices that are

Tulip poplar showing decay from old topping wound
                                                   Tulip poplar with advanced decay from topping

Old Trees
New Trees Why does it matter? Where can I get more information?

For other information, advice and help on this topic, call offices of your State Urban Forestry Coordinator or University Extension service,or  visit urban forestry web sites.