Mixed-effects height-diameter models for pine plantations in northern Florida and Georgia
January 23, 2021
| Mixed-effects individual tree height-diameter models are presented for commercially and ecologically important pines in northern Florida and Georgia. USA. Equations are presented for trees within plantations of loblolly (.Pinus laeda L.), longleaf (Pinus palustris P. Mill.), sand (Pints clausa (Chapm. ex Engelm.) Vasey ex Sarg.), and slash (Pinus elliollii Engelm.) pine. After obtaining height-diameter measurements from a plot/stand of interest, these mixed-effects models can be calibrated to produce localized individual tree height estimates. Based on model calibration of independent data from South Carolina, the use of two or three trees from a plot to calibrate the model provides a reasonable compromise between predictive ability and field sampling times. If calibrated at the stand-level, three trees could be used but larger sample sizes of 10 or 15 would likely produce more accurate estimates. To calibrate these models for specific plots/stands, an Excel spreadsheet isavailable on request. |