Please use this identifier to cite or link to this item:
Title: Chestnut high forest stands: biometrical study in the north of Portugal
Authors: Nunes, Luís
Monteiro, Maria do Loreto
Patrício, Maria do Sameiro
Alpuim, Teresa
Martins, Lucílio
Keywords: Castanea sativa Mill.
High forest
Regression analysis
Volume equations
Issue Date: 2005
Publisher: International Society of Horticultural Science (ISHS)
Citation: Nunes, L.F.; Alpuim, T; Monteiro, M.L.; Martins, L.S.; Patrício, M.S. (2005) - Chestnut high forest stands: biometrical study in the north of Portugal. Acta Horticulturae. ISSN 0567-7572. 693. p. 713-719.
Series/Report no.: 693;
Abstract: Growing sweet chestnut (Castanea sativa) in high forest stands is a lucrative investment. Wood with medium and large dimensions can attain interesting profitability levels. Furthermore, forest producers are interested of new on this species and decision criteria for the best management are needed for landowners. So, accuracy is very important when evaluating volume in standing trees. Based on regression theory, it is developed predicting equations of wood volume as a function of tree variables easily measured (fast and cheap), such as diameter at breast height (DBH) and tree total height (h). Variable selection in volume equations was based on a stepwise modified procedure (linear models) and using generalized-F tests (nonlinear models). The resulting volume equation, with DBH and h as regressors, was confronted with the equation recommended by the Portuguese Forest Services. In order to evaluate wood volume at the lowest costs, the height to diameter relationship was also analyzed. Candidate regression equations were evaluated basing on fitting statistics and validation statistics, complemented with the use of generalized-F tests. The biological behavior of the equations was also considered.
ISSN: 0567-7572
Publisher Version:
Appears in Collections:ARN - Publicações em Proceedings Indexadas ao ISI/Scopus

Files in This Item:
File Description SizeFormat 
showpdf-1.pdf302,42 kBAdobe PDFView/Open

FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.