Growth and Yield of Shortleaf Pine In the West Gulf Region

Murphy, Paul V.; Beltz, Roy C.

doi:10.2737/so-rp-169

Cited by 14 publications

(12 citation statements)

References 1 publication

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“…It grows in 22 states over more than 1,139,600 km 2 , ranging from southeastern New York to eastern Texas (Willet, 1986). Previous shortleaf pine forest growth studies include Murphy (1982Murphy ( , 1986, Murphy et al (1992), Lynch et al (1991Lynch et al ( , 1999, and Lynch and Murphy (1995). However, there is still relatively little published work on shortleaf pine growth modeling compared to other southern pines.…”

Section: Introductionmentioning

confidence: 95%

Nonlinear mixed modeling of basal area growth for shortleaf pine

Budhathoki

Lynch

Guldin

2008

Forest Ecology and Management

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Section: Introductionmentioning

confidence: 95%

Nonlinear mixed modeling of basal area growth for shortleaf pine

Budhathoki

Lynch

Guldin

2008

Forest Ecology and Management

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“…Para identificar possíveis tendenciosidades nas estimativas de produção volumétrica total e por classe de diâmetro, foram aplicadas as estatísticas utilizadas por Murphy & Sternitzke (1979): em que: RQEM é a raiz quadrada do erro médio; MD é a média das diferenças; MDP é a média das diferenças percentuais; N é o número de casos, ou seja, o número de parcelas com volume observado nas classes de diâmetros indicadas; e V i e V i são os volumes estimados e observados para cada classe de diâmetro, respectivamente.…”

Section: Methodsunclassified

Projeção da distribuição diamétrica de povoamentos de eucalipto em diferentes amplitudes de classe

Júnior

Nogueira

Oliveira

et al. 2010

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi verificar a qualidade da modelagem da distribuição diamétrica de povoamentos equiâneos de eucalipto, de acordo com a variação na amplitude de classe utilizada. Avaliaram-se tanto o ajuste da função aos dados observados quanto a projeção dos parâmetros da função, por meio de um modelo de distribuição diamétrica. Foram utilizados dados de 48 parcelas permanentes, obtidos em quatro ocasiões. Constatou-se equivalência estatística entre as distribuições observadas e as estimadas pela função Weibull, em todas as situações. A função Weibull ajustou-se adequadamente aos dados, independentemente da amplitude de classe; no entanto, a redistribuição teórica dos diâmetros por classe, por meio de um modelo de distribuição diamétrica, foi afetada pela amplitude de classe.Termos para indexação: Eucalyptus grandis x Eucalyptus urophylla, amplitude de classe, densidade de probabilidade, distribuição diamétrica, função Weibull, máxima verossimilhança. Projection of diameter distribution of eucalyptus stands considering different class rangesAbstract -The objective of this work was to assess the fitting quality of the diameter distribution modeling of an even-aged stand of eucalyptus, according to the variation in the diameter class range. Both the function fitting to the observed data and the projection of the function parameters were evaluated, using a diametric distribution model. Data from 48 permanent plots, obtained at four occasions, was used. Statistical equivalence between the observed distributions and the estimated ones by the Weibull function were evidenced in all situations. The Weibull function fitted properly to the observed data independently of class range; however, the theoretical redistribution of diameter per class, using a diametric distribution model, was affected by class range.

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“…6. West Gulf even-aged shortleaf (Murphy 1982, Murphy andBeltz 1981)-Age, site index, merchantable basal area, and sawtimber basal area can be independently manipulated within limits. Volume output in merchantable and sawtimber cubic feet (i.b.)…”

Section: Appendixmentioning

confidence: 99%

MicroComputer Software for Predicting Growth of Southern Timber Stands

Farrar¹

1992

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Sixteen BASIC programs and 21 electronic spreadsheet templates for microcomputers are presented with documentation and examples of use, This software permits simulation of the growth and yield of natural stands of evenaged southern pines, uneven-aged loblolly-shortleaf and shortleaf pines, evenaged yellow-poplar, and of certain planted pine stands for a variety of site indices, thinning regimes, and management schemes. The software employs information from 14 published stand-level prediction systems. Precautions concerning use of the software are also discussed, and software source is presented. Novice knowledge of BASIC or spreadsheet use is required.

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Growth and Yield of Shortleaf Pine In the West Gulf Region

Abstract: An equation system is developed to estimate current volume, projected basal area, and projected volume for merchantable even-aged stands of shortleaf pine in th& West Gulf region. The estimates indicate the expected volumes from the woods-run conditions encountered in practice.

Cited by 14 publications

References 1 publication

Nonlinear mixed modeling of basal area growth for shortleaf pine

Nonlinear mixed modeling of basal area growth for shortleaf pine

Projeção da distribuição diamétrica de povoamentos de eucalipto em diferentes amplitudes de classe

MicroComputer Software for Predicting Growth of Southern Timber Stands

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