Diameter Structure Analysis of Forest Stand and Selection of Suitable Model

Abstract

Ecologically and economically it is important to understand how many tree stems are in each diameter class. The purpose of this study was to fi nd larch forest ( Larix sibirica ) diameter distribution model among Weibull, Burr and Johnson SB distributions. Inventory was conducted near Gachuurt village, Ulaanbaatar, Mongolia. The goodness of fi t test were accompanied with Kolmogorov- Smirnov, Anderson-Darling and Chi-Squared tests for distribution models. Study result shows Johnson SB distribution gave the best performance in terms of quality of fi t to the diameter distribution of larch forest.

Keywords

• diameter distribution model
• Weibull
• Burr
• Johnson SB