Variation in Loblolly Pine Ring Microfibril Angle in the Southeastern United States
The effect of physiographic region on microfibril angle (MFA) in loblolly pine (Pinus taeda L.) in the southern United States was evaluated. MFA was determined at 1.4, 4.6, 7.6, 10.7, and 13.7 m up the stem of 59 trees, representing five physiographic regions. A nonlinear mixed-effects model was dev...
Main Authors: | , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
SWST
2007
|
Subjects: | |
Online Access: | http://wfs.swst.org/index.php/wfs/article/view/1417 |
id |
ftjwfs:oai:ojs.wfs.swst.org:article/1417 |
---|---|
record_format |
openpolar |
spelling |
ftjwfs:oai:ojs.wfs.swst.org:article/1417 2023-05-15T17:28:32+02:00 Variation in Loblolly Pine Ring Microfibril Angle in the Southeastern United States Jordan, Lewis He, Rechun Hall, Daniel B. Clark III, Alexander Daniels, Richard F. 2007-09-27 application/pdf http://wfs.swst.org/index.php/wfs/article/view/1417 eng eng SWST http://wfs.swst.org/index.php/wfs/article/view/1417/1417 http://wfs.swst.org/index.php/wfs/article/view/1417 Copyright (c) 2014 Wood and Fibre Science Wood and Fiber Science; Number 2 / April 2007; 352-363 0735-6161 Clustered data loblolly pine repeated measures random-effects wood properties info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2007 ftjwfs 2023-02-11T17:30:48Z The effect of physiographic region on microfibril angle (MFA) in loblolly pine (Pinus taeda L.) in the southern United States was evaluated. MFA was determined at 1.4, 4.6, 7.6, 10.7, and 13.7 m up the stem of 59 trees, representing five physiographic regions. A nonlinear mixed-effects model was developed to test for regional differences in the initial value of MFA, the rate at which MFA changes with ring number from pith, and the lower bound of MFA achieved. Our results suggest that the parameters of interest differ significantly by region. It was found that MFA differs significantly between the South Atlantic, Gulf, and Hilly regions, compared to the North Atlantic and Piedmont regions. The initial value of MFA was found to be smaller in the Piedmont compared to all other regions. Similarly, the rate at which MFA changes with ring number was found to be significantly smaller in the North Atlantic and Piedmont regions. A test of the lower bound of MFA indicates that the Piedmont region has a significantly larger lower asymptote. These results combined indicate that overall, MFA values are larger in the North Atlantic and Piedmont regions. Article in Journal/Newspaper North Atlantic Wood and Fiber Science (E-Journal) |
institution |
Open Polar |
collection |
Wood and Fiber Science (E-Journal) |
op_collection_id |
ftjwfs |
language |
English |
topic |
Clustered data loblolly pine repeated measures random-effects wood properties |
spellingShingle |
Clustered data loblolly pine repeated measures random-effects wood properties Jordan, Lewis He, Rechun Hall, Daniel B. Clark III, Alexander Daniels, Richard F. Variation in Loblolly Pine Ring Microfibril Angle in the Southeastern United States |
topic_facet |
Clustered data loblolly pine repeated measures random-effects wood properties |
description |
The effect of physiographic region on microfibril angle (MFA) in loblolly pine (Pinus taeda L.) in the southern United States was evaluated. MFA was determined at 1.4, 4.6, 7.6, 10.7, and 13.7 m up the stem of 59 trees, representing five physiographic regions. A nonlinear mixed-effects model was developed to test for regional differences in the initial value of MFA, the rate at which MFA changes with ring number from pith, and the lower bound of MFA achieved. Our results suggest that the parameters of interest differ significantly by region. It was found that MFA differs significantly between the South Atlantic, Gulf, and Hilly regions, compared to the North Atlantic and Piedmont regions. The initial value of MFA was found to be smaller in the Piedmont compared to all other regions. Similarly, the rate at which MFA changes with ring number was found to be significantly smaller in the North Atlantic and Piedmont regions. A test of the lower bound of MFA indicates that the Piedmont region has a significantly larger lower asymptote. These results combined indicate that overall, MFA values are larger in the North Atlantic and Piedmont regions. |
format |
Article in Journal/Newspaper |
author |
Jordan, Lewis He, Rechun Hall, Daniel B. Clark III, Alexander Daniels, Richard F. |
author_facet |
Jordan, Lewis He, Rechun Hall, Daniel B. Clark III, Alexander Daniels, Richard F. |
author_sort |
Jordan, Lewis |
title |
Variation in Loblolly Pine Ring Microfibril Angle in the Southeastern United States |
title_short |
Variation in Loblolly Pine Ring Microfibril Angle in the Southeastern United States |
title_full |
Variation in Loblolly Pine Ring Microfibril Angle in the Southeastern United States |
title_fullStr |
Variation in Loblolly Pine Ring Microfibril Angle in the Southeastern United States |
title_full_unstemmed |
Variation in Loblolly Pine Ring Microfibril Angle in the Southeastern United States |
title_sort |
variation in loblolly pine ring microfibril angle in the southeastern united states |
publisher |
SWST |
publishDate |
2007 |
url |
http://wfs.swst.org/index.php/wfs/article/view/1417 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Wood and Fiber Science; Number 2 / April 2007; 352-363 0735-6161 |
op_relation |
http://wfs.swst.org/index.php/wfs/article/view/1417/1417 http://wfs.swst.org/index.php/wfs/article/view/1417 |
op_rights |
Copyright (c) 2014 Wood and Fibre Science |
_version_ |
1766121257092251648 |