Don, On lots and lots of young to early mature trees, 16 feet probably works out well statistically, but for OG specimens all bets are off.
Bob -------------- Original message -------------- From: DON BERTOLETTE <[EMAIL PROTECTED]> Bob- One of the 'rules' of the volume references I emailed recently, chose the upper end of the first 16 foot log...now of course there's a practical reason for that (for lumbermen), but I'd suggest that the selection of a 16' height for diameter mitigated much if not all of the interface zones... -DonRB From: [EMAIL PROTECTED] To: [email protected] Subject: [ENTS] Re: Rejuvenated White Pine Lists and Volume Modeling Date: Wed, 12 Nov 2008 20:37:58 -0500 Bob, Yes that is the crux of the problem. Some of the measurements are in the neloid zone, while others are above it. BVP's idea of measuring higher is good, but there is always a counter of practicality. How can a measurement be made consistent and ideal at the same time? Breast height is better than lower measurements, because the higher up the less less influence of basal flare. But yes it is not ideal either. Ed "Two roads diverged in a yellow wood, And sorry I could not travel both. " Robert Frost (1874–1963). Mountain Interval. 1920. ----- Original Message ----- From: [EMAIL PROTECTED] To: [email protected] Sent: Wednesday, November 12, 2008 7:18 PM Subject: [ENTS] Re: Rejuvenated White Pine Lists and Volume Modeling .... A point I would make about the BH standard for modeling purposes. On some trees, 4.5 feet up is still in the neiloid zone. On other trunks, 4.5 feet is in the zone of the paraboloid or cone shape. Seldom will the 4.5-foot height coincide with an inflection point. If it did, it would be far more useful in tree modeling. BVP likes to go much higher up the trunk to get a circumference in order to volume model. He wants to be clear of the root flare influence - a point you well understand, Ed. .... Bob --~--~---------~--~----~------------~-------~--~----~ Eastern Native Tree Society http://www.nativetreesociety.org You are subscribed to the Google Groups "ENTSTrees" group. To post to this group, send email to [email protected] To unsubscribe send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/entstrees?hl=en -~----------~----~----~----~------~----~------~--~---
