A stand-level growth and yield model for thinned and unthinned even-aged Scots pine forests in Norway

Management of Scots pine ( L.) in Norway requires a forest growth and yield model suitable for describing stand dynamics even-aged forests under contemporary climatic conditions with without the effects silvicultural thinning. A system equations forming such stand-level fitted to long-term experimental data is presented here. The consists component (i) dominant height, (ii) stem density (number stems per hectare), (iii) total basal area, (iv) volume simultaneously using seemingly unrelated regression. density, include thinning modifier forecast thinned stands. It was shown that significantly increased area while reducing competition related mortality. No significant effect found on height. Model examination by means various fit statistics indicated no obvious bias improvement prediction accuracy comparison existing models general. An application developed comparing different management scenarios exhibited plausible behavior we propose this therefore national deployment.Pinus sylvestris