SITE INDEX MODELS FOR CALABRIAN PINE (Pinus brutia Ten.) IN THASOS ISLAND, GREECE

MODELOS DE ÍNDICE DE SÍTIO PARA O PINHEIRO CALABRÊS (Pinus brutia Ten.) NA ILHA THASOS GRÉCIA

ABSTRACT

A site index model for Calabrian pine (Pinus brutia Ten.) in Thasos island (North Aegean sea, Greece) is presented. The model was fitted and validated from 150 stem analyses, obtained from 75 fixed-area plots from five experimental sites. Four height growth equations of difference form were tested and the BAILEY and CLUTTER (1974) function was considered appropriate due to its good performance with both fitting and validation data. The results show errors lower than 5% and little bias.

Keywords:
difference equations; Pinus brutia Ten; site index model