Green Weight, Volume and Taper Equations for Virginia pine (Pinus virginiana) in the Piedmont Region of North Carolina.

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dc.contributor.advisor Dr. George Hess, Committee Member en_US
dc.contributor.advisor Dr. Robert Abt, Committee Member en_US
dc.contributor.advisor Dr. Bronson Bullock, Committee Chair en_US
dc.contributor.author Adams, John William en_US
dc.date.accessioned 2010-04-02T18:12:47Z
dc.date.available 2010-04-02T18:12:47Z
dc.date.issued 2005-09-29 en_US
dc.identifier.other etd-09282005-151149 en_US
dc.identifier.uri http://www.lib.ncsu.edu/resolver/1840.16/2374
dc.description.abstract Virginia pine (Pinus virginiana) is a prolific pioneer tree species in the Piedmont region of North Carolina that has the potential to be a commercially important tree species. Reliable estimates of weight, stem volume and taper are needed for proper management of approximately 405,000 acres of Virginia pine presently located in the North Carolina Piedmont region. A study was conducted to derive merchantable green weight and merchantable volume equations to any upper stem diameter or height for Virginia pine (Pinus virginiana) across the Piedmont region of North Carolina. Models were derived from data collected at the North Carolina State University?s Hill Demonstration Forest. For total and merchantable green weight models, 100 Virginia pine trees were destructively sampled and weighed. Fixed and mixed effects models were fit and prediction equations were developed for total green weight, green weight to any merchantable outside bark or inside bark diameters, and green weight to any upper merchantable height. Combined variable equations, nonlinear ratio equations and nonlinear exponential ratio equations were fit to these data. Using AIC and minus two log likelihood as the criterion for model fit, the mixed effects ratio model proved superior for predicting green weight to any upper merchantable height, while the mixed effects exponential ratio model was superior for predicting green weight to any upper diameter (outside or inside bark). For merchantable volume, 105 Virginia pine trees were sampled to obtain outside and inside bark diameters to estimate stem volume. A combined variable equation was used to determine both inside and outside bark total volume. Fixed and mixed effects models were fit and prediction equations were developed for merchantable volume outside bark to any upper merchantable diameter outside bark and inside bark volume to any upper merchantable diameter inside bark. Equations to predict merchantable outside and inside bark volume to any upper merchantable stem height were also derived. Nonlinear ratio equations and nonlinear exponential ratio equations were fit to these data. Using AIC and minus two log likelihood as the criterion for model fit, the mixed effects ratio model proved superior for predicting merchantable outside bark volume and merchantable inside bark volume to any upper stem height, while the mixed effects exponential ratio model was superior for predicting merchantable outside bark volume to any upper stem diameter outside bark. A mixed effects exponential ratio model was also superior for predicting merchantable inside bark volume to any upper stem diameter inside bark. Taper equations were derived for the fixed effects models to predict diameter at any given height and to predict height at any given diameter for Virginia pine trees. The results of this research should be of interest to forest managers and private landowners in the Piedmont physiographic province of North Carolina and will enable foresters to develop more accurate estimates of weight or volume to any specified merchantable diameter or height limit for Virginia pine trees. en_US
dc.rights I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to NC State University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. en_US
dc.subject green weight en_US
dc.subject mixed effects modeling en_US
dc.subject fixed effects modeling en_US
dc.title Green Weight, Volume and Taper Equations for Virginia pine (Pinus virginiana) in the Piedmont Region of North Carolina. en_US
dc.degree.name MS en_US
dc.degree.level thesis en_US
dc.degree.discipline Forestry en_US


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