Subject of research – pure and mixed forest stands of IV group on Nc type of soil. Objective of research – to analyze various financial indices of different forest stands growing on Nc type of soil. Methodology – using standwise forest database, stands of IV group of forest growing on Nc type of soil were selected and grouped by species composition. Average reforestation expenses by tree species as well as average expenditures for stand protection and supervision were used. Volume of mature stands at cutting age were calculated using growth models by dr. A. Tebėra. Faustman’soil expectation value was calculated using two alternative interest rates, 1 % and 2 %. Results of research – it was defined that birch and spruce mixed forest stands reaches the highest Faustman’s soil expectation value using both 1 % and 2 % interest rate. The same stands provide highest forest rent. The lowesr values using all the three indices reach adler stands.

For the first time in Lithuania the foliage spectral reflectance properties of common tree species were investigated using hyperspectral imaging. The methodological outline was formulated and the procedures of practical hyperspectral imaging application were developed to stimulate the progress of hyperspectral remote sensing in Lithuanian forestry. Information extracted from foliage hyperspectral reflectance data was used to accurately determine forest tree species and the provenances of Scots Pine trees. The satisfactory results of determination of Scots Pine crown defoliation and the concentration of some needles chemical constituents were achieved investigating the foliar hyperspectral reflectance, too. The first spectral libraries of common Lithuanian tree species foliar reflectance were built considering the growing season. / Suformuoti hiperspektrinio skenavimo naudojimo įvairioms miško medžių savybėms tirti metodiniai ir praktiniai pagrindai – sukurtos ir išbandytos mėginių paėmimo, jų paruošimo skenuoti, skenavimo atlikimo ir gautos informacijos apdorojimo metodikos, kurios aprobuotos vykdant mokslinius tyrimus. Nustatyti vegetacijos sezono momentai, kuriais skirtingų miško medžių rūšių atpažinimas nuotoliniu būdu pagal jų spektrinus atspindžius būtų tiksliausias, o tai sudaro prielaidas tobulinti kitas nuotoliniais. Pasiūlyti metodai paprastosios pušies spyglių kai kurių cheminių elementų koncentracijai nustatyti naudojant hiperspektrinį skenavimą. Sukurtos Lietuvos miškuose augančių pagrindinių medžių rūšių lapijos spektrinio atspindžio kreivių bibliotekos, naudotinos miškų inventorizacijoje, kalibruoti ir klasifikuoti orlaiviuose sumontuotais jutikliais išgautus Lietuvos medynų hiperspektrinius vaizdus.