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Compatible Cubic-Foot Stem Volume And Upper-Stem Diameter Equations For Semi-Intensive Plantation Grown Loblolly Pine Trees In East Texas, Dean W. Coble, Keith Hilpp
Compatible Cubic-Foot Stem Volume And Upper-Stem Diameter Equations For Semi-Intensive Plantation Grown Loblolly Pine Trees In East Texas, Dean W. Coble, Keith Hilpp
Faculty Publications
The Max-Burkhart taper equation was used to develop compatible taper and volume equations for semi-intensive plantation grown loblolly pine (Pinus taeda L.) trees in East Texas. Semi-intensive plantations in East Texas are characterized by some form of mechanical site preparation, a burn, possibly chemical weed control, improved seedlings if planted after 1985, and, possibly, a midrotation thinning and/or fertilization. The equations in this study were compared with those of Lenhart et al. [Lenhart, J.D., T.L. Hackett, C.J. Laman, T.J. Wiswell, and J.A. Blackard. 1987. Tree content and taper functions for loblolly and slash pine trees planted on non-old field in …
A New Diameter Distribution Model For Unmanaged Loblolly Pine Plantations In East Texas, Young Jin Lee, Dean W. Coble
A New Diameter Distribution Model For Unmanaged Loblolly Pine Plantations In East Texas, Young Jin Lee, Dean W. Coble
Faculty Publications
A parameter recovery procedure for the Weibull distribution function based on four percentile equations was used to develop a diameter distribution yield prediction model for unmanaged loblolly pine (Pinus taeda L.) plantations in East Texas. This model was compared with the diameter distribution models of Lenhart and Knowe, which have been used in East Texas. All three models were evaluated with independent observed data. The model developed in this study performed better than the other two models in prediction of trees per acre and cubic-foot volume per acre (wood and bark, excluding stump) across diameter classes. Lenhart’s model consistently underestimated …