Predicting Parameters of a Weibull Function for Modeling Diameter Distribution

The Weibull function has been widely used to characterize diameter distribu- tions in a forest stand. Methods have been developed to predict the Weibull parameters, either directly or indirectly, from stand age, density, and dominant height. In this study, four existing methods and two new methods of obtaining the Weibull parameters were evaluated using data from a loblolly pine (Pinus taeda L.) plantation. While both new methods performed well, one of them produced consistently better goodness-of-fit statistics than those from the existing methods. FOR .S CI. 50(5):682-685.