<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">Increasingly intensive and mechanized clear-cutting may deplete the forest ecosystem of essential nutrients. A clear-cut area near Växjö, southern Sweden, was investigated for changes in Mn, Cu and Zn in soil (NH4NO3 extractable and HNO3 soluble) and wavy hair grass (<italic>Deschampsia flexuosa</italic>) after conventional (CC) and whole-tree clear-cutting (WTC). The soil samples were mostly iron podzols. The area consisted of four clear-cut sites, respectively 2, 4, 6 and 8 years old, and an uncut forest reference stand. Each of the clear-cuts was split in two parts representing WTC and CC sites. Manganese showed the most definite trends after clear-cutting, exhibiting higher extractable concentrations in Oe, Oa and E horizons (4-8 years after clear-cutting) and B horizons (6-8 years after clear-cutting). The increase of exchangeable Mn in the E (2-8 years) and B (4-8 years) horizons was particularly strong. Zn concentrations tended to fluctuate with time. There was a tendency to higher Mn and Zn concentrations in the humus layer especially 2 years after CC-treatment compared with WTC, whereas the opposite trend was apparent for Cu. Mn, Cu and Zn concentrations decreased in <italic>Deschampsia flexuosa</italic> 2 years after clear-cutting, possibly due to increased soil pH.</abstract>

Norwegian University of Life Sciences (UMB), P.O. Box 5003, NO-1432 Aas, Norway

School of Industrial Engineering, Växjö University, SE-351 95 Växjö, Sweden

Effect of conventional and whole-tree clear-cutting on concentrations of some micronutrients in coniferous forest soil and plants

About the heritability influence to the growth performance in Scots pine (<italic>Pinus sylvestris</italic> L.) progeny trials

<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">Forest has always been an important natural resource. Issues related to forest reserve, coverage area, distribution pattern and status have been important to the forest, nature protection, as well as to environment management specialists. The present studies have proved that it is not easy to find a clear and simple answer to the above-mentioned essential issues. The indicators of the importance of the forest coverage or the coverage area at a certain period of time depend on the applied assessment methodology, primary source used, etc. The main objectives of this study were to analyze the possibilities of using historical maps for studying the formation and changes of the forest coverage in the longer timely retrospect. The continuity of the forests and the possibilities of defining the variation of the areas covered with forest and open landscape were studied at the test area using the map material covering 150-year period (reference years were 1850, 1949 and 2002). The results of the analyses show that it is possible to reconstruct partially the formation of the forest in some areas and it is possible to define the areas, which have been covered with forests for tens or hundreds of years. It is possible to analyze from which land use classes the present forest community has been formed of and define the age of it. At the same time, several methodological questions arise in connection with the interpretation of the map information of the materials of the 19th century and definition of the term "forest". For example, one problematic issue is the vague definition of the class "<italic>Buschland</italic>" which in present terms could have at the time of mapping been either agricultural land or already a young forest. The comparison carried out at the test area showed that the coverage rate of the present forest areas with the areas covered with forests or such vague areas in 1850 is 75%.</abstract>

Assessment of changes in forest coverage based on historical maps

Institute of Forestry and Rural Engineering, Estonian University of Life Sciences, Kreutzwaldi 5, 51014 Tartu, Estonia

Tartu Observatory, Tõravere 61602, Tartumaa, Estonia

Factors affecting the accuracy of forest clear-cut area estimation on medium spatial resolution satellite winter images

The radial growth of pine stands in changing environmental conditions

<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">The paper presents a forest planning model for Northern Germany with an objective function which includes an economic, even flow and spatial component. The spatial modeling approach followed in this analysis relies on specific geographic relations among neighboring stands, including the distance between stand centroids and the length of the common boundary between adjacent compartments. To our knowledge, this is a new and more realistic approach in spatial optimization when compared with earlier approaches. The geographic data are derived from a GIS system and stored in a database. The database also includes details of all management regimes and the corresponding objective function coefficients. The method is first applied in a relatively small forest with only 41 compartments. The Simulated Annealing algorithm is used to identify the optimum combination of management regimes. Solutions are presented for different objective function components. When the even flow and spatial components were added in the objective function, the economic objective was only moderately reduced. The method is then also applied using a bigger example, a forest with 591 compartments. The results, obtained within a reasonable processing time, were similar and, because of the large number of compartments, the even flow was perfectly balanced.</abstract>

Combining spatial and other objectives in forest design

Biomass production of grey alder, hybrid alder and silver birch stands on abandoned agricultural land

AHEAD OF PRINT

Volume 79 (2023): Issue 1 (December 2023)

Volume 78 (2023): Issue 1 (November 2023)

Volume 77 (2022): Issue 1 (December 2022)

Volume 76 (2022): Issue 1 (December 2022)

Volume 75 (2021): Issue 1 (December 2021)

Volume 74 (2021): Issue 1 (December 2021)

Volume 73 (2020): Issue 1 (December 2020)

Volume 72 (2020): Issue 1 (September 2020)

Volume 71 (2019): Issue 1 (December 2019)

Volume 70 (2019): Issue 1 (June 2019)

Volume 69 (2018): Issue 1 (December 2018)

Volume 68 (2018): Issue 1 (June 2018)

Volume 67 (2017): Issue 1 (December 2017)

Volume 66 (2017): Issue 1 (June 2017)

Volume 65 (2016): Issue 1 (December 2016)

Volume 64 (2016): Issue 1 (June 2016)

Volume 63 (2015): Issue 1 (December 2015)

Volume 62 (2015): Issue 1 (June 2015)

Volume 61 (2014): Issue 1 (December 2014)

Volume 60 (2014): Issue 1 (June 2014)

Volume 59 (2013): Issue 1 (December 2013)

Volume 58 (2013): Issue 1 (June 2013)

Volume 57 (2012): Issue 1 (December 2012)

Volume 56 (2012): Issue 1 (June 2012)

Volume 55 (2011): Issue 1 (December 2011)

Volume 54 (2011): Issue 1 (June 2011)

Volume 53 (2010): Issue 2010 (December 2010)

Volume 52 (2010): Issue 2010 (June 2010)

Volume 51 (2009): Issue 2009 (December 2009)

Volume 50 (2009): Issue 2009 (June 2009)

Volume 49 (2008): Issue 2008 (December 2008)

Volume 48 (2008): Issue 2008 (June 2008)

Forestry Studies

 Forestry Studies | Metsanduslikud Uurimused is a peer-reviewed journal managed by the Institute of Forestry and Rural Engineering, Estonian University of Life Sciences. The journal publishes original research articles, reviews, technical reports and short communications. Papers are published in English or Estonian with English summary. Authors whose mother tongue is not English are strongly urged to have their manuscripts reviewed linguistically before submission. Submission of an article is understood to imply that the article is original and is not being considered for publication elsewhere. Manuscripts generally should not exceed 25 one-sided 1.5-spaced printed pages, including tables, illustrations, references and abstract. Reviews must not exceed 20 pages, technical reports 5 pages. The authors should aim to submit their work as concisely as possible and longer papers will be accepted under exceptional circumstances. Suitable manuscripts are considered by at least two independent referees before acceptance.   Why subscribe and read   the journal publishes research papers on all aspects of forestry (silviculture, dendrology, tree physiology and genetics, forest products, forest operation and techniques, forest economics and policy, etc.), and also close subjects (environmental protection, ecology, botany, zoology, entomology, pathology, soil science, etc.),  the journal is published twice a year in paper and electronic versions,  peer reviewed journal by experts from Europe and US,  publishing history since 1939.   Why submit   submissions accepted in a wide range of categories: original research articles, reviews, technical reports and short communications,  rapid review (by two independent referees) and fast editing process,  coverage by major abstracting and indexing services,  publishing without charge,  accessibility through MetaPress platform.   Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 