PPSITE - A New Method of Site Evaluation for Longleaf Pine: Model Development and User's Guide

Harrington, Constance A.

doi:10.2737/so-gtr-080

Cited by 1 publication

(2 citation statements)

References 8 publications

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“…Actual construction of the site-prediction model for longleaf pine was accomplished in stages. The general framework from the model developed for loblolly pine (Harrington 1990) was used as the starting point for the longleaf pine model. The development of the lob-1011~ model is briefly summarized here; those interested in a more detailed description of the procedure should consult Harrington (1991).…”

Section: Model Constructionmentioning

confidence: 99%

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PPSITE - A New Method of Site Evaluation for Longleaf Pine: Model Development and User's Guide

Harrington¹

1990

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A model was developed to predict site index (base age 50 years) for longleaf pine (Pinus palustris Mill.). The model, named PPSITE, was based on soil characteristics, site location on the landscape, and land history. The model was constrained so that the relationship between site index and each soil-site variable was consistent with what was known about the biology of the species. The model was quantified empirically with information available from the literature or other sources and with data collected for this study from 50 stands. Because of the way the model was developed, PPSITE is an example of an expert, or knowledge-based, system. For the original set of 50 stands, the difference between site index estimated from tree ages and heights and site index predicted by the model averaged 2.8 feet with the chi-square test of accuracy indicating that site index prediction should be within ? 5.5 feet (p

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Section: Model Constructionmentioning

confidence: 99%

“…in the Pacific Northwest. More recently, a Baker-Broadfoot type of model to predict site index for loblolly pine (Pinus tuedu L.) was developed and made available in the form of a computer program (Harrington 1990).…”

Section: Introductionmentioning

confidence: 99%

PPSITE - A New Method of Site Evaluation for Longleaf Pine: Model Development and User's Guide

Cited by 1 publication

References 8 publications

PPSITE - A New Method of Site Evaluation for Longleaf Pine: Model Development and User's Guide

PPSITE - A New Method of Site Evaluation for Longleaf Pine: Model Development and User's Guide

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