Provisional equations for estimating total and merchantable volume of Tectona grandis trees in Costa Rica
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 an...
| Main Authors: | , |
|---|---|
| Format: | Journal Article |
| Language: | Inglés |
| Published: |
2003
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/18900 |
| _version_ | 1855519265616035840 |
|---|---|
| author | Pérez Cordero, L.D. Kanninen, M. |
| author_browse | Kanninen, M. Pérez Cordero, L.D. |
| author_facet | Pérez Cordero, L.D. Kanninen, M. |
| author_sort | Pérez Cordero, L.D. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| 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%). |
| format | Journal Article |
| id | CGSpace18900 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2003 |
| publishDateRange | 2003 |
| publishDateSort | 2003 |
| record_format | dspace |
| spelling | CGSpace189002025-01-24T14:12:22Z Provisional equations for estimating total and merchantable volume of Tectona grandis trees in Costa Rica Pérez Cordero, L.D. Kanninen, M. regression analysis merchantable volume stem form form factors diameter height tectona grandis 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%). 2003 2012-06-04T09:08:55Z 2012-06-04T09:08:55Z Journal Article https://hdl.handle.net/10568/18900 en 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. |
| spellingShingle | regression analysis merchantable volume stem form form factors diameter height tectona grandis Pérez Cordero, L.D. Kanninen, M. Provisional equations for estimating total and merchantable volume of Tectona grandis trees in Costa Rica |
| title | Provisional equations for estimating total and merchantable volume of Tectona grandis trees in Costa Rica |
| title_full | Provisional equations for estimating total and merchantable volume of Tectona grandis trees in Costa Rica |
| title_fullStr | Provisional equations for estimating total and merchantable volume of Tectona grandis trees in Costa Rica |
| title_full_unstemmed | Provisional equations for estimating total and merchantable volume of Tectona grandis trees in Costa Rica |
| title_short | Provisional equations for estimating total and merchantable volume of Tectona grandis trees in Costa Rica |
| title_sort | provisional equations for estimating total and merchantable volume of tectona grandis trees in costa rica |
| topic | regression analysis merchantable volume stem form form factors diameter height tectona grandis |
| url | https://hdl.handle.net/10568/18900 |
| work_keys_str_mv | AT perezcorderold provisionalequationsforestimatingtotalandmerchantablevolumeoftectonagrandistreesincostarica AT kanninenm provisionalequationsforestimatingtotalandmerchantablevolumeoftectonagrandistreesincostarica |