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Wood Science and Technology

, Volume 35, Issue 1–2, pp 27–39 | Cite as

Nondestructive sampling of Eucalyptus globulus and E. nitens for wood properties. I. Basic density

  • C. A. Raymond
  • A. Muneri

Abstract

A non-destructive sampling strategy for basic density, based on removing 12 mm bark-to-bark cores, was developed in E. globulus and E. nitens. Fifty trees of each species, aged 5 to 9 years, were sampled across a range of sites. Core samples were removed on both a north-south and an east-west axis from 6 fixed heights in the base of the tree (0.5 m, 0.7 m, …, 1.5 m). Whole-tree values were calculated from disc samples removed at eight percentage heights (0, 10, 20, …, 70%) and correlations between the cores and whole-tree values were used to determine the optimal sampling height. Core samples were found to be reliable predictors of whole-tree density, explaining between 84% and 89% of the variation between trees. Core sampling of E. globulus and E. nitens to estimate basic density of whole-trees and stands is feasible; cores from trees at all E. globulus sites gave high correlations with whole-tree values. For E. nitens, site differences were apparent, and it is recommended that a small destructive sampling program should be undertaken prior to commencing a major sampling program. Recommended optimal sampling heights are 1.1 m for E. globulus and 0.7 m for E. nitens. Core orientation was not important and density was not related to tree size. Six whole-tree samples or eight core samples are required for estimating the mean density of a stand at a specific site to an accuracy of ±20 kg m−3 with a 95% confidence interval.

Keywords

Confidence Interval Sampling Strategy Eucalyptus Core Sample Specific Site 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • C. A. Raymond
    • 1
  • A. Muneri
    • 2
  1. 1.CSIRO Forestry and Forest Products, GPO Box 252-12, Hobart TAS 7001, AustraliaAU
  2. 2.CRC for Sustainable Production Forestry, GPO Box 252-12, Hobart TAS 7001, AustraliaAU

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