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Title:Assessment of the physical and mechanical properties of Pseudocedrela kotschyi wood from Ghana's savannah zone : vertical variation and utilization implications
Authors:ID Wongara Ibrahim, Bashiru (Author)
ID Bih, Francis Kofi (Author)
ID Chakurah, Issah (Author)
Files:.pdf PDF - Presentation file, download (1,68 MB)
MD5: 00B5D8DFD5EA7EA99457B856F149D8B3
 
Language:Slovenian
Typology:1.01 - Original Scientific Article
Organization:Logo SciVie - Slovenian Forestry Institute
Abstract:V tej študiji so ocenili fizikalne in mehanske lastnosti lesa Pseudocedrela kotschyi iz območja Savannah v Gani z uporabo treh odraslih dreves iz Jeyirija v okrožju Wa East. Vzorci iz spodnjega, srednjega in zgornjega dela debla so bili testirani po protokolih BS 373 (1957). Rezultati so pokazali znatne vertikalne gradiente v lastnostih lesa: vsebnost vlage se je z višino povečala s 44,5 % na 49,54 % (p = 0,001), medtem ko se je gostota zmanjšala s 747,92 kg/m³ na 705,63 kg/m³ (p = 0,042). Dimenzijska stabilnost se je poslabšala navzgor, pri čemer se je volumetrično krčenje povečalo z 9,48 % na 12,46 % (p = 0,005), volumetrično nabrekanje pa z 10,09 % na 15,41 % (p = 0,003). Vse mehanske lastnosti so se z višino zmanjševale: modul elastičnosti se je zmanjšal s 4801 na 4077 MPa, modul lomnosti s 24,26 na 19,95 MPa, tlačna trdnost s 37,82 na 33,96 MPa in strižna trdnost s 16,62 na 13,08 MPa. Na splošno ima P. kotschyi značilnosti trdega lesa srednje gostote in zahteva strategije izrabe in razvrščanja na podlagi položaja.
Keywords:Pseudocedrela kotschyi, lastnosti lesa, vertikalne variacije, območje savane, izraba lesa, dimenzijska stabilnost, mehanske lastnosti, razvrščanje na podlagi položaja, tropski trdi les
Publication status:Published
Publication version:Version of Record
Publication date:19.06.2026
Year of publishing:2026
Number of pages:str. 37-47
Numbering:Vol. 139
PID:20.500.12556/DiRROS-30320 New window
UDC:630*81(667)(045)=111
ISSN on article:2335-3112
DOI:10.20315/ASetL.139.3 New window
COBISS.SI-ID:282270211 New window
Publication date in DiRROS:19.06.2026
Views:362
Downloads:247
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Record is a part of a journal

Title:Acta Silvae et Ligni
Publisher:Gozdarski inštitut Slovenije, založba Silva Slovenica, Biotehniška fakulteta, Oddelek za gozdarstvo in obnovljive gozdne vire, Biotehniška fakulteta, Oddelek za lesarstvo
ISSN:2335-3112
COBISS.SI-ID:266761216 New window

Licences

License:CC BY-SA 4.0, Creative Commons Attribution-ShareAlike 4.0 International
Link:http://creativecommons.org/licenses/by-sa/4.0/
Description:This Creative Commons license is very similar to the regular Attribution license, but requires the release of all derivative works under this same license.

Secondary language

Language:English
Title:Ocena fizikalnih in mehanskih lastnosti lesa Pseudocedrela kotschyi iz območja savane v Gani : vertikalne spremembe in pomen za njegovo uporabo
Abstract:This study assessed the physical and mechanical properties of Pseudocedrela kotschyi wood from Ghana's Savannah zone using three mature trees from Jeyiri in the Wa East District. Specimens from the bottom, middle, and top stem sections were tested following BS 373 (1957) protocols. The results revealed significant vertical gradients in wood properties: moisture content increased with height from 44.5% to 49.54% (p = 0.001), while density also decreased from 747.92 kg/m³ to 705.63 kg/m³ (p = 0.042). Dimensional stability deteriorated upward, with volumetric shrinkage rising from 9.48% to 12.46% (p = 0.005) and volumetric swelling increasing from 10.09% to 15.41% (p = 0.003). All mechanical properties declined with height: the modulus of elasticity decreased from 4,801 to 4,077 MPa, the modulus of rupture from 24.26 to 19.95 MPa, compression strength from 37.82 to 33.96 MPa, and shear strength from 16.62 to 13.08 MPa. Overall, P. kotschyi exhibits medium-density hardwood characteristics and requires position-based utilization and grading strategies.
Keywords:Pseudocedrela kotschyi, wood properties, vertical variation, savannah zone, timber utilization, dimensional stability, mechanical properties, position-based grading, tropical hardwood


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  1. Acta Silvae et Ligni

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