In Master thesis investigate mature stand volume determination. Stands must be determined by: a) a selective method for measuring tree data (at the forest stand volume), 2) continuous measurement of the volume of trees, 3) the volume of manufactured wood products (by adding bio-diversity and tree seed volumes, as well as the addition of waste under "Medienos tūrio struktūros” tables.)

Object of research - Tytuvėnai forest enterprises Kelmė region IV group mature trees.

Aim of research - to assess crossed stand merchantable timber volume and accuracy in common reasons for the differences.

Methods of research - the timber volume errors, obtained by comparing the continuous measurement of wood in the forest data set in the volume and output data analysis. Compare the different methods produce timber volume.

Results of the research: The assessment of the spruce volume crossed by a continuous method of measuring the trees, the results showed that the average wood volume is 0.7 % higher compared with the forest data (selective tree method). Stands under different tree species, the largest differences between pine 8,7 % and lime 8,2 % tree volumes.

The assessment of forest enterprises Tytuvėnai mature stands of trees under the continuous measurement method (standard) and made of wood products (by adding bio-diversity and tree seedling, plus the volume of waste) finds that cut down more than expected, on average 0.2% increase.

Raktažodžiai: Selective measurement of trees, continuous measurement of trees, timber production, volume setting, measurement error.