Study object. The state managed forests of Middle Lithuanian plain landscape geographical region (Kedainiai, Birzai, Joniskis, Kaunas, Pakruojis and Panevezys forest enteprises) and Nemunas bottom-land plain geographical region (Tauragė, Jurbarkas, Sakiai, Kazlu Ruda and Marijampole forest enterprises). Study aim. To evaluate the forest yield capacity of nature and administrative units. Methodology. The forest yield capacity is evaluated by calculating the mean volume per hectare and by assessing the yield capacity using the methodology of S. G. Sinicin. Results. There was made a comparison of forest yield capacity between two geographical landscape regions (Middle Lithuanian plain and Nemunas bottom-land plain). It was assessed that the mean volume per hectare in Middle Lithuanian plain is 5,2% and the forest yield capacity (according to S.G. Sinicin) is 3,8 % higher than in Nemunas bottom-land plain geographical region. Further on it was made comparison between the mean volume and forest yield capacity per hectare in forest enterprises in these two geographical regions. It was assessed that the highest mean volumes have Kazlų Rūda, Šakiai and Marijampolė forest enterprises. The highest yield capacities (according to S.G. Sinicin) have Taurage, Jurbarkas and Šakiai forest enterprises. Key words: Middle Lithuanian plain landscape geographical region, Nemunas bottom-land plain landscape geographical region), forest yield capacity, mean volume per hectare. s 1 ha.

Matutis M. The analysis of the project of the main deforestation as the example of Kursenai forestry. Master’s work of forestry studies of forest economics/an adviser doc. A. Rutkauskas; LZUU, - Academy, 2006. – 96 p. 11 picture, 27 tables. Bibliography: 27 titles. SUMMARY In the master’s work there is reached the analysis of the project of the main deforestation as the example of Kursenai forestry. The object of the work: the wood of the forest groups of the state enterprise Kursenai forestry III (protective forests) and IV (economy forests). The objective of the work: to estimate the project of the main deforestation for the state enterprise Kursenai forestry during 1993 – 2005. The methods of the work: a) analysis; b) comparing; c) summation The methodic of the work: analysis of the documents, comparing of the indices and estimation of absolute and comparative volumes. The results of the work: the research was done and presented the main deforestation rates the most different were during 1994-1996, it increased even 25%, and the reason was the massive desiccation of the firs and the main rates of the deforestation were not adjusted. From 1997 the volume of truncated wood followed to the confirmed annual deforestation level, and from 1999 it exceeded in 0.3 thousand ktm. Or 0.5 %. And from 2002 there is strictly followed by the main deforestation rates. The keywords: the rate of the main deforestation; sub-economy, wood capacity, deflection.