Subject of research: : Kaišiadorys state forest enterprise, Žiežmariai district, central part of Strošiūnai forest. Goals of the research: Using Strošiūnai forest 1904, 1947, 1977, 1987 and 2002 years forest inventory data describe forest settlement, forest inventory works, changes in forest resources and possible reasons for that. Methodology: comparative analysis using data grouping, comparing data, indicators specialization, average values and percentages calculation and generalization methods. Research results: Strošiūnai forest, like separate economic unit was created in 1871 during forest inventory works carried out at Bačkonys (55,5 ha), Žasliai (225,4 ha) forests and Strošiūnai forest (804,2 ha), total 1085,2 ha.In years 1871-1904 total area increased by 37,9 ha, woodlands - 46,4 ha (0,8%), areas covered by forests 62,1 ha (2,5%), decreased areas without forest 15,6 ha (1,7%), agriculutural land 0,4 ha and land not used 8,2 ha (0,8%). Total forest area in years 1947-2002 decreased by 25,6 ha, forestland 2,7 ha, woodlands increased by 24%. Not a forestland area decreased by - 22,9ha (1,7%). Area of land dedicated for technological use increased by 21ha (1,6%), agricultural land decreased by 13 ha (1%). In years 1871-1904 pinewoods decreased from 92,7% to 89,8%, birch woodlands stayed the same, spruce forestland increased - from 3,4% to 7,7%. In years 1947-2002 pinewoods decreased almost a half from 82,1% to 46,0%. Areas with spruce increased almost three times (2... [to full text]