http://www.nj.gov/dep/parksandforests/forest/community/bigtree.html
The New Jersey Department of Environmental Protection (DEP) Division of Parks and Forests provides this page about New Jersey Big Trees. It includes info on how to measure a tree in order to nominate it as the Chamption Tree of its species. It also provides a registry of champion trees in New Jersey. It is interesting to compare the Medford Leas Big Trees. to the state Champtions.
http://mdc.mo.gov/landwater-care/homeowners/how-old-tree
The Missouri Department of Conservation (MDC) provides this page with information on how to estimate the age of a tree based on its diameter 4 1/2 feet above ground times the "growth factor" for the species. For example the growth factor for American Beech is 6 so a beech that is 30 inches in diameter at that height would be approximately 180 years old.
On "The Island" there is a sign in front of the stump of the Bitternut Hickory that reads, "This tree, once considered the New Jersey State Champion, suffered a lightning strike in the fall of 1997. The sign does not give the size of the former champion. The NJ Big Tree Registry says that the current champion Bitternut History has a circumfereance of 12'6" - thats a diameter of 48 inches.
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