Improved guidelines for any-aged forestry

Abstract Any-aged forest management (AAF) is a means to reduce clear-felling without compromising profitability or timber production. The concept of AAF choose between thinning one harvest at time based on what better that in terms the objectives for forest. No permanent choice made rotation (RFM) and continuous cover forestry (CCF). Optimized never less profitable than RFM CCF because all cutting types both RMF are also allowed AAF. This study developed new set guidelines managing boreal stands under when landowner maximizes economic profitability. first part indicates whether stand should be cut left grow. advice basal area, mean tree diameter, minimum allowable post-thinning site productivity, discount rate. If optimal decision harvesting, second instruction determines thinning. In case thinning, remaining two steps determine rate different diameter classes. were using modeling approaches, regression analysis, optimization, applied Finnish holdings, representing southern zone other northern parts zone. results show improves compared current instructions RFM. use decreased lower acceptable area stand.