The SOHARC Model System for Growth and Yield of Southern Hardwoods
Authors: McTague, John Paul; O'Loughlin, David; Roise, Joseph P.; Robison, Daniel J.; Kellison, Robert C.
Source: Southern Journal of Applied Forestry, Volume 32, Number 4, November 2008 , pp. 173-183(11)
Publisher: Society of American Foresters
Abstract:A system of stand level and individual tree growth-and-yield models are presented for southern hardwoods. These models were developed from numerous permanent growth-and-yield plots established across 13 states in the US South on 9 site types, in even-aged (age classes from 20 to 60 years), fully stocked, naturally regenerated mixed hardwood and mixed hardwood-pine stands. Nested plots (⅕ and ac) were remeasured at 5-year intervals. The system of permanent plots was established and maintained by private and public members in the North Carolina State University Hardwood Research Cooperative. Stand level models are presented for dominant height, survival, basal area prediction and projection, and the ingrowth component. Individual tree diameter growth and tree height models were constructed for the most common species: sweetgum, tupelo, yellow-poplar, blackgum, and red maple. All other species were grouped according to growth dynamics into four species groups using cluster analysis. A ranking variable was incorporated into the individual tree growth models to account for competition.
Document Type: Research Article
Publication date: November 2008
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