Record Details

Provisional equations for estimating total and merchantable volume of Tectona grandis trees in Costa Rica

CGSpace

View Archive Info
 
 
Field Value
 
Title Provisional equations for estimating total and merchantable volume of Tectona grandis trees in Costa Rica
 
Creator Pérez Cordero, L.D.
Kanninen, M.
 
Subject regression analysis
merchantable volume
stem form
form factors
diameter
height
tectona grandis
 
Description The aim of this study was to develop equations which best predict individual-tree total volume and mercahntable volume for T. grandis in Costa Rica. A total of 112 trees with ages between 2 and 47 years and breast height diameter (dbh) between 2.4 and 58.7 cm were felled for stem analysis. Linear and non-linear regression analyses were used to model the relaitonship of total volume with dbh, with dbh and total height, and with age. The study also included merchantable volume equations that estimate merchantable volume to a minimum top diameter or bole length. The equations tested in this study fitted the observed data well. Other models, developed elsewhere, tended to overestimate the stem volume, especially at dbh bigger or the same 30cm. General geometric cylinder volume equations combined with a Stem Form Factor of 0.45 (widely used for T. grandis) were less precise than regression models when applied to this data set. Model validation with an independent data set suggested that the models should be calibrated with local data when grat accuracy is required (error less than 10%).
 
Date 2003
2012-06-04T09:08:55Z
2012-06-04T09:08:55Z
 
Type Journal Article
 
Identifier Perez Cordero, L.D., Kanninen, M. 2003. Provisional equations for estimating total and merchantable volume of Tectona grandis trees in Costa Rica . Forests, Trees and Livelihoods 13 :345-359. ISSN: 1472-8028.
1472-8028
https://hdl.handle.net/10568/18900
https://www.cifor.org/knowledge/publication/1456
 
Language en
 
Source Forests, Trees and Livelihoods