The Weibull probability density functions and Hyperbolic were compared by efficiency for describing the diameter structure of teak stands (Tectona grandis L. f.) undergoing thinning. These functions with three and four parameters were adjusted using data from 98 permanent plots and rectangular (490 m²), located in thinning stand of Tectona grandis in the Brazilian state of Mato Grosso, being measured for 10 years. Adjustments were made by Maximum Likelihood and adherence was assessed by Kolmogorov-Smirnorv test (a = 1%) and also compared to the residual squares sum (RSS) of the various adjustments. All of the functions presented adherence to data by the Kolmogorov-Smirnorv test (a = 1%). The hyperbolic function had lower squares sum of waste and lower values for the adherence test. It was concluded that the hyperbolic function was more efficient to describe the diameter structure of the studied stands.
Diameter distribution; Weibull; Hyperbolic and Teak
