Yield Estimates for Loblolly Pine Plantations
Three stand models, representing a range of alternatives for loblolly pine (Pinus taeda L.) yield estimation, were evaluated and compared with independent data on the basis of merchantable cubic-foot yield estimates. The comparisons included a multiple regression model, a diameter distribution model, and an individual-tree simulation model. Using observed number of trees and average height of dominants and codominants on the test plots, analysis of deviations of estimated from observed yields revealed that (1) all three models provided accurate estimates; (2) all models were free from prediction bias due to stand conditions: and (3) the regression and diameter distribution models were higher in precision than the individual-tree simulation model. Selection of a model depends on the amount of stand detail desired and the management practices to be evaluated.
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Document Type: Journal Article
Affiliations: Forest Biometrician, Weyerhaeuser Company, Hot Springs, Arkansas
Publication date: 01 September 1979