Abstract
A linked pair of hypotheses which represent causal explanations for plant growth and stand mortality for an even-aged stand are developed. The pair of dynamic equations lead to a four-parameter Douglas-fir simulation model. The four-parameter model relates the development of stand volume and density to site quality, initial stocking density, and alternative thinning regimes. The mortality hypothesis, a dynamic hypothesis related to stand density and stand growth, generates the −3/2 power law as an equilibrium solution.
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