An Acoustics Operations Study for Loblolly Pine (Pinus taeda) Standing Saw Timber with Different Thinning History
There is currently a request from landowners in southeastern USA to provide a nondestructive tool that can differentiate the quality between stands of 25 and 30 years of age subjected to different thinning treatments. A typical site with various thinning regimes was used to vary the wood quality and...
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North Carolina State University
2016-07-01
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doaj-0cce86bb85924bdc8299d142c19193762020-11-24T21:29:12ZengNorth Carolina State UniversityBioResources1930-21261930-21262016-07-011137512752110.15376/biores.11.3.7512-7521An Acoustics Operations Study for Loblolly Pine (Pinus taeda) Standing Saw Timber with Different Thinning HistoryCharles Essien0Qingzheng Cheng1Brian K. Via2Edward F. Loewenstein3Xiping Wang4School of Forestry and Wildlife Sciences Auburn University, Auburn AL; United StatesSchool of Forestry and Wildlife Sciences Auburn University, Auburn AL; United StatesSchool of Forestry and Wildlife Sciences Auburn University, Auburn AL; United StatesSchool of Forestry and Wildlife Sciences Auburn University, Auburn AL; United StatesForest Products Laboratory, USDA 1 Gifford Pinchot Drive, Madison, WI 53726 USA; United StatesThere is currently a request from landowners in southeastern USA to provide a nondestructive tool that can differentiate the quality between stands of 25 and 30 years of age subjected to different thinning treatments. A typical site with various thinning regimes was used to vary the wood quality and to determine whether acoustics had the ability to separate for stiffness differences at a given age and local geography. A stand at age 29 with three different spacing (prior thinning) levels was chosen. Three hundred trees (100 per treatment) were randomly selected and acoustically tested for sound velocity using the Time-of-Flight (ToF) method for unthinned, thinned, and twice-thinned stands, respectively. The key finding of the study was that the estimated stiffness of the previously thinned treatments was actually greater than that of the unthinned group, despite having diameters as much as 28% larger. During a forest cruise, knowing that a higher-diameter stand is similar or higher in stiffness could raise the dollar value and harvest priority.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_3_7512_Essien_Acoustics_Operations_Study_PineAcoustic velocityStiffnessLoblolly pinesThinning regimes |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Charles Essien Qingzheng Cheng Brian K. Via Edward F. Loewenstein Xiping Wang |
spellingShingle |
Charles Essien Qingzheng Cheng Brian K. Via Edward F. Loewenstein Xiping Wang An Acoustics Operations Study for Loblolly Pine (Pinus taeda) Standing Saw Timber with Different Thinning History BioResources Acoustic velocity Stiffness Loblolly pines Thinning regimes |
author_facet |
Charles Essien Qingzheng Cheng Brian K. Via Edward F. Loewenstein Xiping Wang |
author_sort |
Charles Essien |
title |
An Acoustics Operations Study for Loblolly Pine (Pinus taeda) Standing Saw Timber with Different Thinning History |
title_short |
An Acoustics Operations Study for Loblolly Pine (Pinus taeda) Standing Saw Timber with Different Thinning History |
title_full |
An Acoustics Operations Study for Loblolly Pine (Pinus taeda) Standing Saw Timber with Different Thinning History |
title_fullStr |
An Acoustics Operations Study for Loblolly Pine (Pinus taeda) Standing Saw Timber with Different Thinning History |
title_full_unstemmed |
An Acoustics Operations Study for Loblolly Pine (Pinus taeda) Standing Saw Timber with Different Thinning History |
title_sort |
acoustics operations study for loblolly pine (pinus taeda) standing saw timber with different thinning history |
publisher |
North Carolina State University |
series |
BioResources |
issn |
1930-2126 1930-2126 |
publishDate |
2016-07-01 |
description |
There is currently a request from landowners in southeastern USA to provide a nondestructive tool that can differentiate the quality between stands of 25 and 30 years of age subjected to different thinning treatments. A typical site with various thinning regimes was used to vary the wood quality and to determine whether acoustics had the ability to separate for stiffness differences at a given age and local geography. A stand at age 29 with three different spacing (prior thinning) levels was chosen. Three hundred trees (100 per treatment) were randomly selected and acoustically tested for sound velocity using the Time-of-Flight (ToF) method for unthinned, thinned, and twice-thinned stands, respectively. The key finding of the study was that the estimated stiffness of the previously thinned treatments was actually greater than that of the unthinned group, despite having diameters as much as 28% larger. During a forest cruise, knowing that a higher-diameter stand is similar or higher in stiffness could raise the dollar value and harvest priority. |
topic |
Acoustic velocity Stiffness Loblolly pines Thinning regimes |
url |
http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_3_7512_Essien_Acoustics_Operations_Study_Pine |
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