Dynamic Site Model for Loblolly Pine (Pinus taeda L.) Plantations in the United States
Authors: Diéguez-Aranda, Ulises1; Burkhart, Harold E.1; Amateis, Ralph L.1
Source: Forest Science, Volume 52, Number 3, June 2006 , pp. 262-272(11)
Abstract:
Data from a large, long-term loblolly pine (Pinus taeda L.) plantation study including 186 permanent sample plots were used to evaluate four dynamic site equations derived with the generalized algebraic difference approach (GADA). All of the equations are base-age invariant and directly estimate height and site index from any height and age. The fittings were done in one stage using the base-age invariant dummy variables method. A first-order autoregressive error structure was used to correct the serial correlation of the longitudinal data used in this study. Cieszewski's model (Cieszewski, C.J. 2002. Comparing fixed- and variable-base-age site equations having single versus multiple asymptotes. For. Sci. 48:7-23) best described the data.Keywords: Site index; generalized algebraic difference approach; base-age invariant dynamic equation
Document Type: Research article
Affiliations: 1: Ulises Diéguez-Aranda, Departamento de Ingeniería Agroforestal, Universidad de Santiago de Compostela, Escuela Politécnica Superior, Campus universitario, 27002 Lugo, Spain—Phone: +34-982-285900; udieguez@lugo.usc.es. Harold E. Burkhart, Department of Forestry, Virginia Polytechnic Institute and State University, College of Natural Resources (0324), Blacksburg, VA 24061. Ralph L. Amateis, Department of Forestry, Virginia Polytechnic Institute and State University, College of Natural Resources (0324), Blacksburg, VA 24061., Fax: +34-982-285926
