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#1
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Estimating the age of live trees
I'm interested in estimating the age of some live trees. I've found this
link: http://www.learner.org/jnorth/tm/leaf/HowOld.html, which gives a "growth factor" for several species but is not comprehensive. White Pine (Pinus strobus) and Eastern Redcedar (Juniperus virginianus) are two species for which I would like to find a "growth factor". |
#2
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Bore into the trunk with a narrow-diameter hollow tube.
Extract it and eject the contents. Then count the rings. I saw this on TV. "codex" wrote in message news:nJwpd.7967$K36.3166@trndny03... I'm interested in estimating the age of some live trees. I've found this link: http://www.learner.org/jnorth/tm/leaf/HowOld.html, which gives a "growth factor" for several species but is not comprehensive. White Pine (Pinus strobus) and Eastern Redcedar (Juniperus virginianus) are two species for which I would like to find a "growth factor". |
#3
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Thanks, but there's some problems with that technique. First, I don't have
a tool that would remove a hollow core from these trees (The largest are 3.5-4.0 ft. in diameter). Second, its intrusive and I'd rather not bore into the tree. Finally, I'd like to survey a hundred trees or so which would make it impractical. The "growth factor" method involves a quick and easy measurement with a tape, and an estimate is all I need, not spot on accuracy. Thanks again. |
#4
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"codex" wrote in message news:Rcxpd.7969$K36.4493@trndny03... Thanks, but there's some problems with that technique. First, I don't have a tool that would remove a hollow core from these trees (The largest are 3.5-4.0 ft. in diameter). Second, its intrusive and I'd rather not bore into the tree. Finally, I'd like to survey a hundred trees or so which would make it impractical. The "growth factor" method involves a quick and easy measurement with a tape, and an estimate is all I need, not spot on accuracy. Thanks again. Maybe one could do a high-frequency echo (like done on pregnant women) and then count the rings revealed. Then calculate an algorithm based on a sample of trees, and then apply this to the remainder. The following: http://www.botanik.uni-bonn.de/conif...ics/oldest.htm gives usual methods including the simple one (with picture) I suggested before. If you go the Google thing and type in "tree age" in the 'exact phrase' box, a whole lot of links come up. Good luck. |
#5
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"Peter Jason" wrote in message ... "codex" wrote in message news:Rcxpd.7969$K36.4493@trndny03... Thanks, but there's some problems with that technique. First, I don't have a tool that would remove a hollow core from these trees (The largest are 3.5-4.0 ft. in diameter). Second, its intrusive and I'd rather not bore into the tree. Finally, I'd like to survey a hundred trees or so which would make it impractical. The "growth factor" method involves a quick and easy measurement with a tape, and an estimate is all I need, not spot on accuracy. Thanks again. Maybe one could do a high-frequency echo (like done on pregnant women) and then count the rings revealed. Then calculate an algorithm based on a sample of trees, and then apply this to the remainder. The following: http://www.botanik.uni-bonn.de/conif...ics/oldest.htm gives usual methods including the simple one (with picture) I suggested before. If you go the Google thing and type in "tree age" in the 'exact phrase' box, a whole lot of links come up. Good luck. Also http://primera.tamu.edu/kcchome/homeowner/treeage.htm |
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