Potential density and basal area prediction equations for unthinned Eucalyptus hybrid plantations in the Gujarat state of India

Abstract

The aim of this paper is to present equation for estimating potential stand density and basal area projection model for unthinned pure even-aged plantations of Eucalyptus hybrid in Gujarat State of India. Relationships between quadratic mean diameter and stems ha −1 were developed, which was used to establish the limiting density line. Eight different stand level models, belonging to the path invariant algebraic difference form of a non-linear growth function, were compared for projecting basal area. They can be used to predict future basal area as a function of stand variables like dominant height and stem number per hectare and are crucial for evaluating different silvicultural treatment options. The performance of the models was evaluated using different statistical criteria. The model proposed by Pienaar and Shiver performed best and hence is recommended for projecting the basal area in E. hybrid stands.