Przyrost wartości drzewa jako kryterium regulacji cięć w rębniach złożonych

Profitability of the investment related to the leaving of trees of different diameter in a stand was calculated on the basis of present value expressed in money, calculated gross land rent, anticipated end−of−period (EOP) value and knowledge of tree growth rate for an exemplary fir stand. Assuming the break−even point at 1.5% and 3%, a desirable minimum tree increment was established for which leaving of trees in a stand should be considered economically justified. The impact of the assumed level of anticipated profitability on the vertical structure and form of stands managed under the selection and Swiss irregular shelterwood cutting systems was discussed.