Modelling the influence of radiata pine log variables on structural lumber production
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad del Bío Bío
2023
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| author | Elvis Gavilán |
| author_facet | Elvis Gavilán |
| contents | Modelling the influence of radiata pine log variables on structural lumber production Elvis Gavilán Rosa M. Alzamora Luis A. Apiolaza Katia Sáez Juan Pedro Elissetche Antonio Pinto Agrociencias log variables Pinus radiata regression models structural lumber Acoustic technology We run logit models to explain the variability of Pinus radiata structural lumber in 71 second and third unpruned logs. The response variable was the proportion of lumber with a static modulus of elasticity greater or equal than 8000 MPa, pMSG8+, and the explanatory variables were log volume, branch index, largest branch, log internode index, wood basic density, and acoustic velocity. The average pMSG8+ volume was 44,30 % and 36,18 % in the second and third log respectively. Ten models were selected based on meeting statistical assumptions, their goodness of fit, and the statistical significance of their parameters. The best models (R2 - adj. > 0,75) included acoustic velocity (AV) as explanatory variable, which explained 56,25 % of the variability of pMSG8+. Models without AV presented goodness of fit ranging from 0,60 to 0,75 (R2 - adj.), and variables with the highest weight to explain the variability of pMSG8+ were volume, followed by wood basic density, branch index, and largest branch. It is possible to model pMSG8+ from log variables even when acoustic velocity is not available; however, this requires wood basic density models calibrated for the Pinus radiata growing zone. 2023 artículo científico 0717-3644 https://www.redalyc.org/articulo.oa?id=48575202002 https://www.redalyc.org/journal/485/48575202002/ https://www.redalyc.org/journal/485/48575202002/html/ https://www.redalyc.org/journal/485/48575202002/48575202002.epub https://www.redalyc.org/journal/485/48575202002/movil 10.4067/s0718-221x2023000100102 en http://www.redalyc.org/revista.oa?id=485 Maderas. Ciencia y Tecnología application/pdf Universidad del Bío Bío Maderas. Ciencia y Tecnología (Chile) Vol.25 |
| format | Artículo científico |
| id | redalyc_48575202002 |
| language | en |
| publishDate | 2023 |
| publisher | Universidad del Bío Bío |
| spellingShingle | Modelling the influence of radiata pine log variables on structural lumber production Elvis Gavilán Agrociencias log variables Pinus radiata regression models structural lumber Acoustic technology Modelling the influence of radiata pine log variables on structural lumber production Elvis Gavilán Rosa M. Alzamora Luis A. Apiolaza Katia Sáez Juan Pedro Elissetche Antonio Pinto Agrociencias log variables Pinus radiata regression models structural lumber Acoustic technology We run logit models to explain the variability of Pinus radiata structural lumber in 71 second and third unpruned logs. The response variable was the proportion of lumber with a static modulus of elasticity greater or equal than 8000 MPa, pMSG8+, and the explanatory variables were log volume, branch index, largest branch, log internode index, wood basic density, and acoustic velocity. The average pMSG8+ volume was 44,30 % and 36,18 % in the second and third log respectively. Ten models were selected based on meeting statistical assumptions, their goodness of fit, and the statistical significance of their parameters. The best models (R2 - adj. > 0,75) included acoustic velocity (AV) as explanatory variable, which explained 56,25 % of the variability of pMSG8+. Models without AV presented goodness of fit ranging from 0,60 to 0,75 (R2 - adj.), and variables with the highest weight to explain the variability of pMSG8+ were volume, followed by wood basic density, branch index, and largest branch. It is possible to model pMSG8+ from log variables even when acoustic velocity is not available; however, this requires wood basic density models calibrated for the Pinus radiata growing zone. 2023 artículo científico 0717-3644 https://www.redalyc.org/articulo.oa?id=48575202002 https://www.redalyc.org/journal/485/48575202002/ https://www.redalyc.org/journal/485/48575202002/html/ https://www.redalyc.org/journal/485/48575202002/48575202002.epub https://www.redalyc.org/journal/485/48575202002/movil 10.4067/s0718-221x2023000100102 en http://www.redalyc.org/revista.oa?id=485 Maderas. Ciencia y Tecnología application/pdf Universidad del Bío Bío Maderas. Ciencia y Tecnología (Chile) Vol.25 |
| title | Modelling the influence of radiata pine log variables on structural lumber production |
| topic | Agrociencias log variables Pinus radiata regression models structural lumber Acoustic technology |
| url | https://www.redalyc.org/articulo.oa?id=48575202002 https://www.redalyc.org/journal/485/48575202002/ https://www.redalyc.org/journal/485/48575202002/html/ https://www.redalyc.org/journal/485/48575202002/48575202002.epub https://www.redalyc.org/journal/485/48575202002/movil |