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Diameter Distribution Models: Loblolly Pine Plantations, Dean W. Coble
Diameter Distribution Models: Loblolly Pine Plantations, Dean W. Coble
Data
A parameter recovery procedure for the Weibull distribution function based on four percentile equations was used to develop a new diameter distribution yield prediction model for unmanaged slash pine (Pinus elliottii Engelm.) plantations in east Texas. This new model was similar in structure to the model of Lee and Coble (2006) in their work with east Texas loblolly pine plantations. The new model was compared to the diameter distribution model of Lenhart (1988), which was developed for slash pine plantations in east Texas, as well as to two other models developed using iterative techniques suggested and inspired by Cao (2004). …
Site Index Equations, Dean W. Coble
Site Index Equations, Dean W. Coble
Data
A generalized sigmoid growth function was used in this study to model site index for unmanaged or low-intensity managed loblolly pine (Pinus taeda, L.) and slash pine (Pinus elliottii, Engelm.) plantations in east Texas.
Whole-Stand Models: Loblolly And Slash Pine Plantations, Dean W. Coble
Whole-Stand Models: Loblolly And Slash Pine Plantations, Dean W. Coble
Data
A new compatible whole-stand growth and yield model to predict total tree cubic-foot volume per acre yield (outside and inside-bark) was developed for unmanaged loblolly pine (Pinus taeda) and slash pine (Pinus elliottii) plantations in east Texas. This model was compared to the non- compatible whole-stand model of Lenhart (1996) and the Lenhart (1996) model refit to current data. For the two species, all three models were evaluated with independent observed data. The model developed in this study out-performed both Lenhart models in prediction of future yield and basal area per acre for all age classes combined and by five-year …
Fusiform Rust Trends In East Texas: 1969 To 2002, Dean W. Coble, Young-Jin Lee
Fusiform Rust Trends In East Texas: 1969 To 2002, Dean W. Coble, Young-Jin Lee
Data
Fusiform rust ( Cronartium quercuum [Berk.] Miyabe ex Shirai f. sp. fusiforme) infection rates in East Texas increased to nearly 50 percent in slash pine (Pinus elliottii Engelm.) and about 15 percent in loblolly pine ( Pinus taeda L.) plantations during the 18-year period from 1969 to 1987. New data from the East Texas Pine Plantation Research Project showed that fusiform rust infection rates in slash pine stabilized around 20 - 30 percent after 1987, then decreased to about 15 percent by 2002. For loblolly pine, the rates stabilized around 10 percent after 1987, then decreased to around 5 percent …