White Pine Site Index for the Southern Forest Survey

Parresol, Bernard R.; Vissage, John S.

doi:10.2737/srs-rp-10

Cited by 24 publications

(26 citation statements)

References 9 publications

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“…A height-by-age equation can be differentiated to provide an equation for height growth rather than accumulated height. An equation in this form is referred to as an algebraic difference equation [45]. In this method, height H 2 at age A 2 is expressed as a function of A 2 , height H 1 at age A 1 and A 1 .…”

Section: Methods For Constructing a Site Index Systemmentioning

confidence: 99%

“…Although the three methods are not mutually exclusive, the difference equation method has been the preferred form for developing site index curves [1,2,5,11,45,48].…”

Section: Methods For Constructing a Site Index Systemmentioning

confidence: 99%

“…In this case, autocorrelation was modelled by expanding the error term in the following way [28,29,45]:…”

Section: Data Structure and Model Fittingmentioning

confidence: 99%

“…The most important desirable attributes for site index equations are: (1) polymorphism, (2) sigmoid growth pattern with an inflexion point, (3) horizontal asymptote at old ages, (4) logical behaviour (height should be zero at age zero and equal to site index at the reference age), and (5) base-age invariance [2,28,45]. The fulfilment of these attributes depends on both the construction method and the mathematical function used to develop the curves, and it cannot always be achieved.…”

Section: Function Selectionmentioning

confidence: 99%

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Site quality equations for Pinus sylvestris L. plantations in Galicia (northwestern Spain)

et al. 2005

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-Difference equations derived on the basis of the Sloboda and McDill-Amateis differential functions, and from the integral form of the Bertalanffy-Richards, Korf and Hossfeld growth functions were used to model the dominant height growth of Scots pine (Pinus sylvestris L.) in Galicia (north-western Spain). Data from stem analysis and permanent sample plots were combined and used for fitting. Both numerical and graphical analyses were used to compare alternative models. The cross-validation approach was used to analyse the predictive ability of the models. The algebraic difference form of the differential function proposed by McDill and Amateis resulted in the best compromise between biological and statistical aspects, producing the most adequate site curves. It is therefore recommended for height growth prediction and site classification of Scots pine plantations in Galicia. This equation is base-age invariant, so any number of points (A 1 , H 1 ) on a specific site curve can be used to make predictions for a given age A 2 and the predicted height H 2 will always be the same.height growth / site classification / algebraic difference equation / even-aged forest stand Résumé -Équations prédictives de la fertilité des stations pour des plantations de Pinus sylvestris L. en Galice (nord-ouest de l'Espagne). À partir des équations différentielles de Sloboda et McDill-Amateis, ainsi que de la forme intégrale de Bertalanffy-Richards, Korf et Hossfeld, un modèle a été établi pour caractériser la croissance en hauteur dominante du pin sylvestre (Pinus sylvestris L.) en Galice (nordest de l'Espagne). Des données, issues à la fois de l'analyse de tiges et de l'accroissement de placettes semi-permanentes, ont été combinées pour établir ce modèle. Des analyses numériques et graphiques ont été utilisées pour comparer les différents modèles existants. Les résidus de la validation croisée ont été utilisés pour évaluer le comportement des équations. L'équation en différences algébriques obtenue à partir de la fonction différentielle de McDill et Amateis donna le meilleur compromis entre les aspects biologique et statistique, fournissant les courbes de qualité les plus adéquates. C'est donc l'équation recommandée pour prédire la croissance en hauteur et pour réaliser les classifications de qualité des sites de plantation des pins sylvestres en Galice. Cette équation est invariante quant à l'âge de référence, de sorte que la hauteur à un âge donné peut être estimée à partir de la hauteur à un autre âge, sans compromettre la validité des prédictions. croissance en hauteur / classement des sites / équation en différence algébrique / peuplement équienne

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Section: Methods For Constructing a Site Index Systemmentioning

confidence: 99%

“…Although the three methods are not mutually exclusive, the difference equation method has been the preferred form for developing site index curves [1,2,5,11,45,48].…”

Section: Methods For Constructing a Site Index Systemmentioning

confidence: 99%

“…In this case, autocorrelation was modelled by expanding the error term in the following way [28,29,45]:…”

Section: Data Structure and Model Fittingmentioning

confidence: 99%

Section: Function Selectionmentioning

confidence: 99%

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Site quality equations for Pinus sylvestris L. plantations in Galicia (northwestern Spain)

et al. 2005

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“…Estimativas consistentes somente podem ser obtidas com uma avaliação precisa do potencial de crescimento (Parresol & Vissage, 1998).…”

Section: Introductionunclassified

Classificação da capacidade produtiva de povoamentos não desbastados de clones de eucalipto

Oliveira

Leite

Nogueira

et al. 2008

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi desenvolver e propor um procedimento para a estratificação de florestas de clones de eucalipto não desbastados, para a classificação de sua capacidade produtiva. Utilizaram-se dados provenientes de 70 clones, distribuídos em 5.020 parcelas permanentes de inventários florestais contínuos, com pelo menos três medições, de periodicidade anual, em cada clone. Para todos os clones, foi ajustado o modelo de Schumacher para as variáveis: área basal; altura dominante; diâmetro médio; e volume comercial, com casca. Com esses parâmetros, foi utilizado o método de Tocher, que se mostrou eficiente para agrupar clones com tendências semelhantes de crescimento em altura dominante. A estimativa de índice de local, para clones com menos de três medições, pode ser determinada a partir das informações de altura dominante, diâmetro médio, área basal e volume, obtidas do inventário florestal contínuo de outros clones.Termos para indexação: Eucalyptus, análise de agrupamento, análise de componentes principais, índice de local, inventário florestal, método da curva-guia. Classification of the productive capacity of unthinned stands of eucalypt clonesAbstract -The objective of this work was to develop and propose a procedure for stratification of unthinned eucalyptus clone forest, in order to classify its productive capacity. Data from 70 clones, distributed into 5,020 permanent plots of continuous forest inventories, were used with at least three annual measurements for each clone. For all clones, the Schumacher model was fit for the variables: basal area; dominant height; mean diameter; and commercial volume, with bark. The Tocher method was used to group clones displaying similar dominant height growth tendencies, and this procedure showed to be efficient. Site index estimate, for clones with less than tree measurements, can be determined from information regarding dominant height, mean diameter, basal area and commercial volume obtained from continuous forest inventories.

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Comparison of tree-ring growth and eddy covariance-based ecosystem productivities in three different-aged pine plantation forests

McKenzie

Pisaric

Arain

2020

Trees

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White Pine Site Index for the Southern Forest Survey

Cited by 24 publications

References 9 publications

Site quality equations for Pinus sylvestris L. plantations in Galicia (northwestern Spain)

Site quality equations for Pinus sylvestris L. plantations in Galicia (northwestern Spain)

Classificação da capacidade produtiva de povoamentos não desbastados de clones de eucalipto

Comparison of tree-ring growth and eddy covariance-based ecosystem productivities in three different-aged pine plantation forests

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