A matrix approach to the management of renewable resources, with special reference to selection forests-two extensions.
Proves that there is a unique solution to the model for predicting the resource structure previously described [cf F.A. 28 No. 4404], and describes an iterative technique for calculation of the structure. Computer programmes for this process in Algol, Atlas Autocode and Fortran are obtainable from the author. KEYWORDS: forest management \ forest management \ mathematical models \ forest management \ selection forest