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Problems with models assessing influences of tree size and inter-tree competitive processes on individual tree growth: a cautionary tale
Journal article   Open access  Peer reviewed

Problems with models assessing influences of tree size and inter-tree competitive processes on individual tree growth: a cautionary tale

P W West and D. A Ratkowsky
Journal of Forestry Research, Vol.33, pp.565-577
04/10/2021
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Abstract

Symmetric competition Asymmetric competition Tree growth rate Growth modeling Nonlinear modeling
of each to explaining tree growth rates. They were prevented from doing so both by collinearity between the terms used to describe each of the effects and technical problems involved in the use of nonlinear least-squares regression to fit the models to any one data set. It is concluded that quite new approaches need to be devised if the effects on tree growth of tree size and competitive processes are to be quantified and modelled successfully.

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