HEIGHT-DIAMETER MODELS IN FORESTRY WITH INCLUSION OF COVARIATES

Detalhes bibliográficos
Autor(a) principal: Guimarães, Mayara Aparecida Maciel
Data de Publicação: 2015
Outros Autores: Calegário, Natalino, Carvalho, Luiz Marcelo Tavares de, Trugilho, Paulo Fernando
Tipo de documento: Artigo
Idioma: por
Título da fonte: Cerne (Online)
Texto Completo: https://cerne.ufla.br/site/index.php/CERNE/article/view/187
Resumo: The main difficulty in selecting height-diameter relationships is the large number of variables involved. Techniques for decomposition of model parameters with inclusion of covariates relating to individual trees and to the stand collectively can improve model precision. This study aimed to evaluate quality improvement in the fit of height-diameter models by inclusion of covariates. The datain this study was obtained from commercial Eucalyptus sp. plantations in southernBahia state. Firstly two reduced models were fitted, onelinear and another nonlinear, considering the same trend of height variation as a function of diameter, for all geneticmaterials being studied. Between the two, the logistic model presented the bestperformance for the relevant database. After fitting parameters for the selected model, the complete formulation was fit with inclusion of variables relating to individual trees, which improved model precision. A reduction of 17% was observed in the residual standard error value when comparing reduced model and complete model, with inclusion of covariates.  
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spelling HEIGHT-DIAMETER MODELS IN FORESTRY WITH INCLUSION OF COVARIATESEucalyptusheight-diameter relationshipcovariatesThe main difficulty in selecting height-diameter relationships is the large number of variables involved. Techniques for decomposition of model parameters with inclusion of covariates relating to individual trees and to the stand collectively can improve model precision. This study aimed to evaluate quality improvement in the fit of height-diameter models by inclusion of covariates. The datain this study was obtained from commercial Eucalyptus sp. plantations in southernBahia state. Firstly two reduced models were fitted, onelinear and another nonlinear, considering the same trend of height variation as a function of diameter, for all geneticmaterials being studied. Between the two, the logistic model presented the bestperformance for the relevant database. After fitting parameters for the selected model, the complete formulation was fit with inclusion of variables relating to individual trees, which improved model precision. A reduction of 17% was observed in the residual standard error value when comparing reduced model and complete model, with inclusion of covariates.  CERNECERNE2015-05-20info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://cerne.ufla.br/site/index.php/CERNE/article/view/187CERNE; Vol. 15 No. 3 (2009); 313-321CERNE; v. 15 n. 3 (2009); 313-3212317-63420104-7760reponame:Cerne (Online)instname:Universidade Federal de Lavras (UFLA)instacron:UFLAporhttps://cerne.ufla.br/site/index.php/CERNE/article/view/187/160Copyright (c) 2015 Mayara Aparecida Maciel Guimarães, Natalino Calegário, Luiz Marcelo Tavares de Carvalho, Paulo Fernando Trugilhoinfo:eu-repo/semantics/openAccessGuimarães, Mayara Aparecida MacielCalegário, NatalinoCarvalho, Luiz Marcelo Tavares deTrugilho, Paulo Fernando2015-11-06T13:22:42Zoai:cerne.ufla.br:article/187Revistahttps://cerne.ufla.br/site/index.php/CERNEPUBhttps://cerne.ufla.br/site/index.php/CERNE/oaicerne@dcf.ufla.br||cerne@dcf.ufla.br2317-63420104-7760opendoar:2024-05-21T19:53:36.642430Cerne (Online) - Universidade Federal de Lavras (UFLA)true
dc.title.none.fl_str_mv HEIGHT-DIAMETER MODELS IN FORESTRY WITH INCLUSION OF COVARIATES
title HEIGHT-DIAMETER MODELS IN FORESTRY WITH INCLUSION OF COVARIATES
spellingShingle HEIGHT-DIAMETER MODELS IN FORESTRY WITH INCLUSION OF COVARIATES
Guimarães, Mayara Aparecida Maciel
Eucalyptus
height-diameter relationship
covariates
title_short HEIGHT-DIAMETER MODELS IN FORESTRY WITH INCLUSION OF COVARIATES
title_full HEIGHT-DIAMETER MODELS IN FORESTRY WITH INCLUSION OF COVARIATES
title_fullStr HEIGHT-DIAMETER MODELS IN FORESTRY WITH INCLUSION OF COVARIATES
title_full_unstemmed HEIGHT-DIAMETER MODELS IN FORESTRY WITH INCLUSION OF COVARIATES
title_sort HEIGHT-DIAMETER MODELS IN FORESTRY WITH INCLUSION OF COVARIATES
author Guimarães, Mayara Aparecida Maciel
author_facet Guimarães, Mayara Aparecida Maciel
Calegário, Natalino
Carvalho, Luiz Marcelo Tavares de
Trugilho, Paulo Fernando
author_role author
author2 Calegário, Natalino
Carvalho, Luiz Marcelo Tavares de
Trugilho, Paulo Fernando
author2_role author
author
author
dc.contributor.author.fl_str_mv Guimarães, Mayara Aparecida Maciel
Calegário, Natalino
Carvalho, Luiz Marcelo Tavares de
Trugilho, Paulo Fernando
dc.subject.por.fl_str_mv Eucalyptus
height-diameter relationship
covariates
topic Eucalyptus
height-diameter relationship
covariates
description The main difficulty in selecting height-diameter relationships is the large number of variables involved. Techniques for decomposition of model parameters with inclusion of covariates relating to individual trees and to the stand collectively can improve model precision. This study aimed to evaluate quality improvement in the fit of height-diameter models by inclusion of covariates. The datain this study was obtained from commercial Eucalyptus sp. plantations in southernBahia state. Firstly two reduced models were fitted, onelinear and another nonlinear, considering the same trend of height variation as a function of diameter, for all geneticmaterials being studied. Between the two, the logistic model presented the bestperformance for the relevant database. After fitting parameters for the selected model, the complete formulation was fit with inclusion of variables relating to individual trees, which improved model precision. A reduction of 17% was observed in the residual standard error value when comparing reduced model and complete model, with inclusion of covariates.  
publishDate 2015
dc.date.none.fl_str_mv 2015-05-20
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://cerne.ufla.br/site/index.php/CERNE/article/view/187
url https://cerne.ufla.br/site/index.php/CERNE/article/view/187
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://cerne.ufla.br/site/index.php/CERNE/article/view/187/160
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv CERNE
CERNE
publisher.none.fl_str_mv CERNE
CERNE
dc.source.none.fl_str_mv CERNE; Vol. 15 No. 3 (2009); 313-321
CERNE; v. 15 n. 3 (2009); 313-321
2317-6342
0104-7760
reponame:Cerne (Online)
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Cerne (Online)
collection Cerne (Online)
repository.name.fl_str_mv Cerne (Online) - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv cerne@dcf.ufla.br||cerne@dcf.ufla.br
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