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A Mixed-Effects Height-Diameter Model For Pinus Densiflora Trees In Gangwon Province, Korea, Young Jin Lee, Dean W. Coble, Jung Kee Pyo, Sung Ho Kim, Woo Kyun Lee, Jung Kee Choi
A Mixed-Effects Height-Diameter Model For Pinus Densiflora Trees In Gangwon Province, Korea, Young Jin Lee, Dean W. Coble, Jung Kee Pyo, Sung Ho Kim, Woo Kyun Lee, Jung Kee Choi
Articles
A new mixed-effects model was developed that predicts individual-tree total height for Pinus densiflora trees in Gangwon province as a function of individual-tree diameter (cm). The mixed-effects model contains two random-effects parameters. Maximum likelihood estimation was used to fit the model to 560 height-diameter observations of individual trees measured throughout Gwangwon province in 2007 as part of the National Forest Inventory Program in Korea. The new model is an improvement over fixed effects models because it can be calibrated to a local area, such as an inventory plot or individual stand. The new model also appears to be an improvement …
A Survival Model For Unthinned Loblolly Pine Plantations That Incorporates Non-Planted Tree Competition, Site Quality, And Incidence Of Fusiform Rust, Y. J. Lee, Dean W. Coble
A Survival Model For Unthinned Loblolly Pine Plantations That Incorporates Non-Planted Tree Competition, Site Quality, And Incidence Of Fusiform Rust, Y. J. Lee, Dean W. Coble
Articles
Future biomass yields are functionally related to the number of trees surviving at a given age. A stand level survival model was developed that incorporates competition of non-planted trees, site quality, and the incidence of fusiform rust (Cronartium quercuum [Berk.] Miyabe ex Shirai f. sp. fusiforme). The model consists of a system of two equations, one of which represents the number of surviving trees infected by fusiform rust while the other represents the number of trees not infected by fusiform rust. Data from unthinned loblolly pine (Pinus taeda L.) plantations in East Texas were used to fit and evaluate the …
Modeling Survival For Unthinned Slash Pine Plantations In East Texas Under The Influence Of Non-Planted Tree Basal Area And Incidence Of Fusiform Rust, Young-Jin Lee, Dean W. Coble
Modeling Survival For Unthinned Slash Pine Plantations In East Texas Under The Influence Of Non-Planted Tree Basal Area And Incidence Of Fusiform Rust, Young-Jin Lee, Dean W. Coble
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A stand level survival model for unthinned slash pine (Pinus elliotti!) plantations in east Texas was developed that incorporates density of non-planted tree basal area per hectare competition and the incidence of fusiform rust (Cronartium quercuum). Survival data on planted slash pine trees were collected on 197 permanent research plots that represent a broad range of site, age, and competitive status combinations. A system of two equations was fit to the survival data using simultaneous nonlinear regression. All model parameters were significant at the 0.05 probability level. The model showed that the number of surviving planted slash pine trees decreased …