Dissertations / Theses: 'Forestry'

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Öhman, Karin. "Forest planning with consideration to spatial relationships /." Umeå : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2001. http://epsilon.slu.se/avh/2001/91-576-6082-4.fulltext.pdf.

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Foster, Bryan. "Green Forestry? Case Studies of Sustainable Forestry and Forest Certification." ScholarWorks @ UVM, 2008. http://scholarworks.uvm.edu/graddis/84.

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Abstract This dissertation explored sustainable forest management from multiple perspectives: a literature-based investigation to define management practices that sustain ecological, economic, and social forest resources over time; a field-based research project to identify management practice differences between Forest Stewardship Council (FSC) certified, Sustainable Forestry Initiative (SFI) certified, and uncertified properties in Maine; and a field-based research project to identify stand structural differences between FSC certified and uncertified properties in Vermont. Based on an extensive literature review, we developed an iterative decision-making framework of goal-setting/implementation/ monitoring/review that could assist forest owners in choosing management practices to sustain ecological, economic, and/or social capital over multiple time frames. Our unique contribution is the identification of six concrete management concepts at the implementation phase: (1) BMPs/RIL, (2) biodiversity conservation, (3) community forestry, (4) forest protection, (5) sustained forest product yield, and (6) triad forestry. Forest owners can implement practices under one or more of these concepts to achieve their sustainability goals. We illustrate a hypothetical application of our framework with a case study of an FSC certified managed natural forest in the lowland tropical region of Costa Rica. In the white pine forests of south-central Maine, we compared three FSC, SFI, and uncertified private properties against local scale Montreal criteria using triangulation of evidence from management documents, staff interviews, and field inspections. Certified properties were associated with improved internal management systems and improved practices for biodiversity conservation. However, our data suggest that certification does not necessarily involve fulfillment of all Montreal criteria, such as adherence to sustained timber yield, consideration of multiple social issues, or ecological monitoring at multiple temporal and spatial scales. In northern hardwood stands in central Vermont, we compared three FSC certified and three uncertified that were analogous in terms harvesting date, silvicultural treatment type, forest type, and general location. The uncertified sites were randomly selected to remove bias. We conducted stand structural analysis of both live trees and standing and downed coarse woody debris, and also developed 10-year growth projections using FVS/NE-TWIGS. Our data suggest that FSC certified stands had similar timber economic value, similar live tree structure, and similar tree carbon storage, but significantly greater residual coarse woody debris than comparable uncertified harvested stands.

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Holmström, Hampus. "Data acquisition for forestry planning by remote sensing based sample plot imputation /." Umeå : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2001. http://epsilon.slu.se/avh/2001/91-576-6086-7.pdf.

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Jackson, William James. "The dynamics of lekh forest use in the middle hills of Nepal /." [Richmond, N.S.W.] : Centre for Systemic Development, Faculty of Environmental Management and Agriculture, University of Western Sydney, Hawkesbury, 1999. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030520.101936/index.html.

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McCarter, James B. "Landscape management system (LMS) : background, methods, and computer tools for integrating forest inventory, GIS, growth and yield, visualization and analysis for sustaining multiple forest objectives /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/5520.

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Folegatti, Bruno da Silveira Smidt Mathew F. "The use of mechanical thinning treatments in management of small stands at the wildland urban interface." Auburn, Ala, 2004. http://repo.lib.auburn.edu/EtdRoot/2004/FALL/Forestry_and_Wildlife_Sciences/Thesis/FOLEGATTI_BRUNO_23.pdf.

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Lincoln, Philippa R. "Stalled gaps or rapid recovery the influence of damage on post-logging forest dynamics and carbon balance /." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2008. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=24813.

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Manokaran, N. "Population dynamics of tropical forest trees." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 1988. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=59678.

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Lindemuth, Robert M. "A Field Trial Comparison of Sampling Methods for Estimating Basal Area and Volume in Partially Harvested Stands in Maine." Fogler Library, University of Maine, 2007. http://www.library.umaine.edu/theses/pdf/LindemuthRM2007.pdf.

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10

Luong, Thi Hoan. "Forest resources and forestry in Vietnam." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-190600.

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Forest and forestland are important roles and sources of livelihood for the population living in or near forests and in mountainous areas of Vietnam. The objectives of this paper analysed the change in forest resource, and policy of forestry in Vietnam. In recent several years, forest area rapidly covered an average rate of 240,000 ha/year and had about 13.39 million hectares in 2010. It has contributed to the use of bare land, job creation and improvement of livelihoods for 25% of Vietnam’s population living in mountainous areas. Those results were the purpose of reforestation program and the production of wood industry in Vietnam. In this addition, government policies and regulations have provided a solid foundation for development of the forest plantations and conservation of forest ecosystems though forest land allocation and lease to organizations, households, and individuals. Therefore, the forest utilization has motivated by both environmental and commercial factors in Vietnam based on dividing into three forest categories special use, protection and production forests. However, the development strategy of forest management plan is the difficulties associated with conflicting land claims and boundary disputes due to the value of the established forest
Rừng và đất rừng đóng vai trò quan trọng và là nguồn sinh kế cho người dân sống trong hoặc gần rừng ở các khu vực miền núi của Việt Nam. Mục tiêu của nghiên cứu này phân tích sự thay đổi về tài nguyên rừng và chính sách về lâm nghiệp. Trong một vài năm gần đây, diện tích rừng bao phủ nhanh với tốc độ trung bình 240.000 ha/năm và có khoảng 13,39 triệu ha trong năm 2010 này đã góp phần vào việc sử dụng đất trống, tạo việc làm và cải thiện đời sống cho 25% dân số sống ở khu vực miền núi của Việt Nam. Kết quả này là mục đích của chương trình trồng rừng và sản xuất gỗ công nghiệp tại Việt Nam. Bên cạnh đó, chính sách và các quy định của chính phủ đã cung cấp một nền tảng vững chắc cho việc phát triển diện tích trồng rừng và bảo tồn hệ sinh thái rừng mặc dù rừng và đất rừng đã được giao và khoán cho các tổ chức, hộ gia đình, cá nhân. Vì vậy, việc sử dụng rừng đã thúc đẩy bởi hai yếu tố môi trường và thương mại ở Việt Nam, dựa trên phân loại rừng: rừng đặc dụng, rừng sản xuất và rừng phòng hộ. Tuy nhiên, chiến lược kế hoạch quản lý phát triển rừng có những khó khăn liên quan đến xung đột khiếu nại đất và tranh chấp biên giới do giá trị của rừng được thành lập

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Hanna, Rosemary. "Hidden champions of the B.C. forest industry: are small firms at the cutting edge of value chain innovation? /." Burnaby B.C. : Simon Fraser University, 2005. http://ir.lib.sfu.ca/handle/1892/2348.

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Jackson, William James, of Western Sydney Hawkesbury University, Faculty of Environmental Management and Agriculture, and Centre for Systematic Development. "The dynamics of lekh forest use in the Middle Hills of Nepal." THESIS_FEMA_CSD_Jackson_W.xml, 1999. http://handle.uws.edu.au:8081/1959.7/673.

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Extending Nepal's community forestry programme and its protected area network into lekh forests has been hampered by the assumption that people who live in or near lekh forests treat them as unregulated open access resources. This study tests this assumption by examining the interaction between local people and forests in two lekh areas of the central Middle Hills. The research is comprised of an action research approach, a theoretical framework of ecological anthropology that was also informed by forestry science, and tools and methods drawn from ethnographic fieldwork and rapid rural appraisal. The belief that lekh forests are treated as unregulated open access is challenged by demonstrating that there are clearly defined local use rights to lekh forests. Access to forest resources is regulated by forest users and relatively sophisticated and dynamic indigenous systems of forest management have been developed. The potential for implementing community forestry in the two lekh areas was explored by incorporating an element of action research in the study. A number of challenges are highlighted for the Nepal government to facilitate the improved management and conservation of lekh forests while ensuring an equitable flow of benefits to the people who depend on these forests.
Doctor of Philosophy (PhD)

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Andersson, Mikael. "Spatial allocation of forest production : aspects on multiple-use forestry in Sweden /." Alnarp : Swedish University of Agricultural Sciences, 2002. http://diss-epsilon.slu.se/archive/00000166/.

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Thesis (doctoral)--Swedish University of Agricultural Sciences, 2002.
Thesis documentation sheet inserted. Appendix includes four papers and manuscripts co-written with others. Includes bibliographical references. Also partially issued electronically via World Wide Web in PDF format; online version lacks appendix.

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Buckingham, Kathleen. "The marginalisation of an orphan species : examining bamboo's fit within international forestry institutions." Thesis, University of Oxford, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.669868.

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This thesis presents an examination of the interplay between bamboo and institutions of resource management in China, India and internationally, highlighting the need for greater diversity and scope of Western dominated forestry institutions and associated mechanisms. Firstly, the thesis aims to explore the conceptual understanding of forests and the exclusion of bamboo from this construction. The key reason this question is important is that it changes the 'technological zones‘ of forestry. Growing resource scarcity has meant that bamboo is now an increasingly important input in the global forest products marketplace. Secondly, the thesis aims to examine how governance mechanisms and actors respond to the inclusion of this new input. The thesis adopts the 'paper route'; the first paper traces the socio-historical reasons why bamboo‘s potential is yet to be realised, particularly within international policy. It considers the challenges of forestry being predominantly conceptualised as treed lands and the implications for the limited efficacy of sustainable forestry, carbon and trade instruments when applied to bamboo. The second paper acts as an introduction to Western produced forest certification devices, focusing on their transformation within forestry institutions and perceived legitimacy within China. The third paper focuses on a case study of bamboo certification in India. The final paper analyses the controversy regarding the efficacy of forest certification for bamboo globally. The thesis aims to explore these topics through three lines of theory. First, it contributes to institutional framing theory by examining where the idea of a 'forest' originated from and the consequences this has had for the rise of bamboo as a 'timber' product. Second, the thesis aims to further legitimacy theory in two key ways, by examining how the Chinese government accommodates and facilitates the differing needs of both international and domestic markets, whilst ultimately assuming a legitimate form of (institutionalised) domestic governance, and how the perceived input (procedure) and output (efficacy) legitimacy influence the potential success of current and future forest certification for bamboo. Third, the thesis seeks to provide a dynamic analysis of the role of certification through the lens of performativity, which uncovers how certification can create different realities for different actors. This thesis is timely and important for a number of reasons. Firstly, China is gaining more prominence on the world stage, both as an economic and political power. With increased pressure on forestry resources, the forestry administration is determined to upscale sustainable forest management. This requires adhering to global notions of sustainability thorough market mechanisms and ensuring a degree of autonomy of forest management through localising processes. Secondly, China recently received Forest Stewardship Council (FSC) bamboo certification for some of the most intensively managed areas in the country. This has increased controversy amongst experts regarding the efficacy of the mechanism to truly bring about sustainable bamboo management. Thirdly, on a more global scale, one of the crucial issues with up-scaling bamboo management is the fact that there are over 1,200 species of bamboo, with three different rooting structures: monopodial (diffuse) sympodial (clumping), and amphodial (mixed) – which have distinct policy and management needs. Focusing purely on the large-scale, intensively managed, monopodial or treelike' stands in China would ignore the vast areas of small-scale, sympodial bamboo homesteads with issues regarding flowering and propagation of sterile species. Bamboo plantations in Africa, Latin America, and India are being developed, which require enabling policy and management mechanisms. With a global industry estimated at US$10bn, the implications of an inclusive and enabling frame for bamboo management could have wide ranging impacts for both natural resource management and livelihood development.

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Butler, Sarah Marie. "Forest Disturbance History and Stand Dynamics of the Coweeta Basin, Western North Carolina." Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/ButlerSM2006.pdf.

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Jackson, Noah Voorhees. "Knowledge and use of native trees by local forest users implications for a Philippine protected area /." CONNECT TO THIS TITLE ONLINE, 2007. http://etd.lib.umt.edu/theses/available/etd-03022008-104527/.

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Magill, Daniel J. "Assessing West Virginia NIPF owner characteristics and preferred assistance topics." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1571.

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Thesis (M.S.)--West Virginia University, 2000.
Title from document title page. Document formatted into pages; contains vii, 75 p. : ill., map. Includes abstract. Includes bibliographical references (p. 73-75).

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Brown, Ian K. "Wisconsin statewide urban forest assessment : development and implementation /." Link to full text, 2007. http://epapers.uwsp.edu/thesis/2007/Brown.pdf.

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Tacconi, Luca. "The process of forest conservation in Vanuatu : a study in ecological economics /." [Canberra : s.n.], 1995. http://www.library.unsw.edu.au/%7Ethesis/adt-ADFA/public/adt-ADFA20041111.140928/index.html.

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Thesis (Ph. D.)--University of New South Wales.
Photocopy of original held in Defence Academy Library, University College, University of New South Wales. Includes bibliographical references. Also issued online.

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Richards, Mark L. A. "Modelling competition amongst individual trees in Caledonian Forest." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2007. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=24803.

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Ismoilov, Abbos. "Suspended forestry machines for sustainable forestry." Doctoral thesis, KTH, Maskinkonstruktion (Inst.), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-200123.

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Cut-to-length (CTL) logging is a mechanized two-machine solution. The harvester processes treestems into smaller logs and a forwarder transports the logs from the logging site to a landing areaaccessible by trucks. The working machines for CTL logging are heavy and their suspension systemis generally rudimentary, basically the only damping is provided by the tires. To meet futuredemands on operator comfort, sustainable forestry, and climate concerns, significant challenges areto find means for reducing daily vibration dosage, soil damage, and rolling resistance.Paper A proposes a full-scale virtual model of a four-wheeled forwarder concept equipped with twopendulum axels with an actively controlled hydraulic suspension system mounted on each wheelaxle. The simulation results are then analyzed to determine the required actuation power.Paper B presents a performance comparison of a six-wheeled medium-sized pendulum-armsuspended forwarder, with three different suspension systems; active, semi-active, and passive. Amethodology to optimize and analyze forestry vehicle suspension performance based on multi-bodydynamic simulations are proposed and applied for the studied forwarder.Paper C is a model-based investigation of the dynamic behavior of a traditional eight-wheeledbogie type of forwarder with the main focus on identifying critical issues and suggesting criteria forassessing the performance of the machine while traveling on sloped and rough terrain.Paper D investigates the performance of a novel all-wheel-drive pendulum-arm suspendedmedium-sized forestry machine with passive and active chassis suspensions. The dynamicperformance of the pendulum-arm machine concept is quantified with simulations and comparedwith a “traditional” bogie-machine.Paper E investigates how to model a tracked forwarder and how the performance comparison canbe evaluated in multi-body simulation software like Adams ATV.Paper F presents a comparison of the dynamic behavior of forestry machines with different types ofpassive chassis suspensions from three perspectives: their gentleness to terrain, operator and theirpotential for improved fuel efficiency.Paper G proposes a 12 degrees-of-freedom multi-body dynamics simulation model of a standardeight-wheeled bogie type of medium-sized forwarder and verifies the simulation model withmeasured data from the field test that was carried out the actual machine.Paper H reconfigures the model presented in Paper G and compares a medium-sized forwarderequipped with two different track units with the performance of a wheeled and bogie-type offorwarder on hard rough ground, as well as on soft soil.

QC 20170123

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Baral, Jagadish Chandra. "Government intervention and local processes in community forestry in the hills of Nepal /." Richmond, N.S.W. : University of Western Sydney, Hawkesbury, 1999. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030522.085631/index.html.

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Hartley, Mitschka John. "Effects of Small-gap Timber Harvests on Songbird Community Composition and Site-fidelity." Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/HartleyMJ2003.pdf.

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Pacurari, Doru I. "Evaluation of the use of remotely sensed images to speciate mixed Appalachian forests." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1550.

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Thesis (M.S.)--West Virginia University, 2000.
Title from document title page. Document formatted into pages; contains x, 128 p. : ill. (some col.), maps (some col.) Vita. Includes abstract. Includes bibliographical references (p. 116-121).

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Mohdnoor, Khamurudin. "An input-output framework for the economic impact analysis of industrialization policies for the wood-based industry in Sarawak /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/5461.

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Brown, Sara H. "Modeling the spatial distribution of lightning fires on two national forests." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Summer2009/s_brown_062109.pdf.

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Thesis (M.S. in environmental science)--Washington State University, August 2009.
Title from PDF title page (viewed on Sept. 15, 2009). "School of Earth and Environmental Sciences." Includes bibliographical references (p. 54-56).

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Hart, Tim. "Stem profile equations for several commercially important timber species in Wisconsin /." Link to full text, 2009. http://epapers.uwsp.edu/thesis/2009/Hart.pdf.

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Thesis (M.S.)--University of Wisconsin--Stevens Point, 2009.
Submitted in partial fulfillment of the requirements of the degree Master of Science in Natural Resources (Forestry), College of Natural Resources. Includes bibliographical references (leaves 82-87).

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Wibowo, D. H. "An economic analysis of deforestation mechanisms in Indonesia : empirics and theory based on stochastic differential and fokker-planck equations /." [St. Lucia, Qld.], 1999. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16272.pdf.

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Strandberg, Tora. "Inventorying humans in the forest : a study of coastal forest owners'understanding of the political shift in focus within Swedish forestry." Thesis, Linköping University, Department of Thematic Studies, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1950.

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Forestry operations in Sweden can be traced a long way back in history. The overall emphasis has traditionally been on the forests’ economic or profitable role, even though they are also of great ecological and social interests. Nevertheless, the focus has shifted during the last decade due to the impact of sustainable development. A new Forestry Act has now provided the Swedish forestry with a new policy which is guided by two equally-weighted objectives; production and environmental concern. The European Union (EU) has also adapted to the direction of sustainable development. It places particular interest in the creation of sustainable coastal areas within the union.

The aim of the Bachelor of Science thesis was to investigate how Swedish coastal forest owners define their role in the creation of sustainable coastal forests. The study is built on interviews which were conducted with seven forest owners, all of whom have properties in the coastal zones of Östergötland and Kalmar. These two counties are situated in the south-eastern part of Sweden.

The study raises three different issues. The first is the manner in which the informants shape their knowledge of the existing forestry legislation, based on their identities and responsibilities. The second concerns the preconditions with which they are faced when managing their coastal forest properties and whether or not they see the new legislation as a shift in focus. The final issue highlights the importance of local knowledge and looks at the participation of the informants in the development of new regulations.

The following conclusions are drawn from the investigations. Many owners of forest properties do not identify themselves as forest owners; it is therefore important to be aware of this distinction which is made between being a forest owner and being the holder of a forest property. The coastal forest owners who were interviewed run their forests according to their individual situations. Because of this they do not appear to be part of any shift of focus within the Swedish forestry. As a result, they may not have a defined role in its development. This role would probably be clearer or greater if their local knowledge were more explicitly valuated.

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Luong, Thi Hoan. "Forest resources and forestry in Vietnam: Review paper." Technische Universität Dresden, 2014. https://tud.qucosa.de/id/qucosa%3A29092.

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Forest and forestland are important roles and sources of livelihood for the population living in or near forests and in mountainous areas of Vietnam. The objectives of this paper analysed the change in forest resource, and policy of forestry in Vietnam. In recent several years, forest area rapidly covered an average rate of 240,000 ha/year and had about 13.39 million hectares in 2010. It has contributed to the use of bare land, job creation and improvement of livelihoods for 25% of Vietnam’s population living in mountainous areas. Those results were the purpose of reforestation program and the production of wood industry in Vietnam. In this addition, government policies and regulations have provided a solid foundation for development of the forest plantations and conservation of forest ecosystems though forest land allocation and lease to organizations, households, and individuals. Therefore, the forest utilization has motivated by both environmental and commercial factors in Vietnam based on dividing into three forest categories special use, protection and production forests. However, the development strategy of forest management plan is the difficulties associated with conflicting land claims and boundary disputes due to the value of the established forest.
Rừng và đất rừng đóng vai trò quan trọng và là nguồn sinh kế cho người dân sống trong hoặc gần rừng ở các khu vực miền núi của Việt Nam. Mục tiêu của nghiên cứu này phân tích sự thay đổi về tài nguyên rừng và chính sách về lâm nghiệp. Trong một vài năm gần đây, diện tích rừng bao phủ nhanh với tốc độ trung bình 240.000 ha/năm và có khoảng 13,39 triệu ha trong năm 2010 này đã góp phần vào việc sử dụng đất trống, tạo việc làm và cải thiện đời sống cho 25% dân số sống ở khu vực miền núi của Việt Nam. Kết quả này là mục đích của chương trình trồng rừng và sản xuất gỗ công nghiệp tại Việt Nam. Bên cạnh đó, chính sách và các quy định của chính phủ đã cung cấp một nền tảng vững chắc cho việc phát triển diện tích trồng rừng và bảo tồn hệ sinh thái rừng mặc dù rừng và đất rừng đã được giao và khoán cho các tổ chức, hộ gia đình, cá nhân. Vì vậy, việc sử dụng rừng đã thúc đẩy bởi hai yếu tố môi trường và thương mại ở Việt Nam, dựa trên phân loại rừng: rừng đặc dụng, rừng sản xuất và rừng phòng hộ. Tuy nhiên, chiến lược kế hoạch quản lý phát triển rừng có những khó khăn liên quan đến xung đột khiếu nại đất và tranh chấp biên giới do giá trị của rừng được thành lập.

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Rapera, Corazon L. "Potential impacts of various capital gains tax structures on forest investments." Diss., This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-07282008-135205/.

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32

Pralle, Sarah Beth. "Conflict expansion and containment in forestry politics /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/10748.

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Pirnazarov, Abdurasul. "Forestry machine and soil interaction for sustainable forestry." Doctoral thesis, KTH, Maskinkonstruktion (Inst.), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172519.

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More than 50 percent of the land area of the Nordic countries Finland, Norway, and Sweden are covered by dense forests and they are among the most important producers of forest products in the world. Forestry in these countries is based on sustainable management principles – reforestation follows harvesting. Furthermore, increasing demands for more gentle techniques and technologies with less negative impact on the environment ask for development and implementation of new processes and new machine solutions. The increasing interest in developing forest management approaches that are based on gentleness to the environment requires better understanding of the interaction between the forestry machines and the terrain in the harvesting process.

QC 20150827

Gentle Forest Machines

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34

Thrower, James S. "Model-dependent sampling for timber value in old-growth forests of coastal British Columbia." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/31308.

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The procedure used to sample crown timber before harvesting in B.C. is designed to estimate net volume per ha using systematically located angle-count plots where trees are selected with probability proportional to basal area. The primary purpose of the sample is to provide information for timber valuation and stumpage appraisal. Timber value is the most important population parameter for stumpage calculation, but it is not explicitly considered in the sampling design. The objective of this study was to modify the current sampling method to increase the efficiency for estimating value using model-dependent sampling theory. Eighteen model-dependent sampling strategies were developed from six subsampling methods using three estimators. The six subsampling methods were used to select trees from angle-count plots to estimate the relationship between cruiser-called and estimated tree value. Three subsampling methods used probability-based selection of trees and three methods used purposive-based selection of trees. Ratio, average ratio, and regression estimators were used with each method. The 18 strategies were tested using Monte Carlo simulation with 2000 samples at each of nine sample sizes in three test populations. The test populations were created by grouping angle-count plot data into mutually exclusive sets reflecting different stand characteristics. The sample sizes were n = 20,40, and 60 plots with m = n, 3n, and 5n subsampled trees. Individual tree value was estimated with regression equations that used variables closely related to the value of each species. The sampling strategies were evaluated for bias, sample variance, achieved subsample size, sampling cost, confidence interval coverage, and relative advantage against the current sampling method. The model-dependent subsampling methods using purposive selection of trees were more efficient than the current sampling method considering cost and variance. The purposive-based methods were biased up to about 5%; the probability-based methods were slightly less biased. The two most efficient methods were: i) purposive selection of trees with the highest estimated values in a plot; and ii) purposive selection of trees with estimated values within a given range to give a second-stage sample balanced on the auxiliary variable. The greatest efficiency was always achieved with one sample tree per plot. The current sampling method was unbiased for estimating value but required approximately twice as many plots to estimate value to the same level of precision as net volume.
Forestry, Faculty of
Graduate

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35

Jucker, Tommaso. "Relating aboveground wood production to tree diversity in forest ecosystems." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709094.

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Makano, Rosemary Fumpa. "Does institutional capacity matter? a case study of the Zambian Forestry Department /." Diss., St. Louis, Mo. : University of Missouri--St. Louis, 2008. http://etd.umsl.edu/r3321.

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37

Shrimpton, Nicole H. "An economic assessment of uneven-aged forestry based on the modelling of forestry operations." Thesis, University of Edinburgh, 1990. http://hdl.handle.net/1842/652.

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In recent years, interest in uneven-aged forestry has been increasing in Britain, particularly for sensitive areas such as recreation and amenity forests. Literature on the economics of uneven-aged forestry is scarce and few operational, uneven-aged forests are available for study. Therefore, in order to quantify the operating costs associated with uneven-aged forestry, a modelling approach was chosen. The resulting model is written in FORTRAN and uses a series of square two-dimensional arrays to represent a block of forest. The block may then be managed by clearfelling and replanting at a specified age, or by a system of group management with a choice of four group sizes. The resulting model was then used to investigate the effect of the following management strategies on operating times: 1. Varying the scale of working (i.e. the group size and forest size) in the uneven-aged forest. 2. Using shortwood or pole-length harvesting systems and a range of machine types within each harvesting system. 3. Varying the length of time taken to transform the structure of the forest from even-aged to uneven-aged. 4. Varying the age of the trees when the transformation from even-aged to uneven-aged structure begins. The results obtained from running the model show that the time taken to carry out an operation is influenced both by the absolute size of the group within the forest block and by the number of groups of that size within the forest block. This fragmentation effect explains why it is difficult to determine the absolute costs of working for a specific group size, because it is the combination of group size, number of groups and forest block size, which determines costs. Most of the results below are based on a range of group sizes from 1.000 ha. to 0.0625 ha., with a block size of 16 ha. Forwarders were penalized when the group size was decreased to 0.0625 ha. (-12% increase over clearfelling), because very small groups do not contain full forwarding loads and a large proportion of total forwarding time is spent manoeuvring into and out of groups. However, the operating times for the three group sizes 1.00 ha., 0.25 ha. and O. 1 1 ha. were very similar indicating that the group size can be quite small before any extra forwarding costs are incurred. On poor sites, the cost differential between the largest and smallest groups is greater. In contrast to forwarding, skidders are most penalized with the decision to adopt an uneven-aged system, and once that decision has been made, there is not a clear increase in costs with decreasing group size. During the transformation period, felling and thinning times in the uneven-aged system are significantly higher than those for the even-aged system, because trees are being harvested prematurely to create the early groups, but this difference is reduced once the forest is transformed. Felling and thinning times increase gradually as the group size decreases, because more care is needed for the felling operation and more time is needed for snedding coarse edge trees. Replanting times for the uneven-aged forest are approximately 8% - 14% higher than replanting times for clearfelling. The results from the model were then analysed using the EXCEL spreadsheet programme to examine, among other things, the cost implications of varying group size, and the relative profitability of uneven-aged and even-aged management. First,optimum ages to begin transformation were found, which varied with the Yield Class and discount rate chosen. Then, the effect of the length of the transformation period was examined and a long transformation period (80-years) was found to be preferable to a short transformation period (40-years). The analysis showed that at high discount rates even-aged and uneven-aged management had similar Net Present Values, but at lower discount rates the even-aged system was preferred. The greatest financial penalty was incurred with adoption of an uneven-aged system, and reducing the group size had relatively little impact on Net Present Values. Other costs and benefits, such as scenic beauty and recreation potential, could not be included in the model, because research relating these values to forest management variables has not been carried out. Therefore, these mostly non-financial factors were discussed for even-aged and uneven-aged forestry, based on a review of the literature.

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Li, Yaoxiang. "Modeling operational forestry problems in central Appalachian hardwood forests." Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3814.

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Thesis (Ph. D.)--West Virginia University, 2005
Title from document title page. Document formatted into pages; contains ix, 144 p. : ill. (some col.) Includes abstract. Includes bibliographical references (p. 107-114).

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39

Naka, Kozma Jr. "Making Albanian Forestry Work." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/40517.

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Recently, Albania has had major transition from a state-controlled to a market economy. The economic reformation has led to widespread liberalization of prices, external trade, and domestic marketing. These changes have been positive for some segments of the economy, but to date the forestry sector has been negatively affected by the transition. The decline of forest resources accelerated and continues. Inefficiencies, price distortions, government fiscal austerity, rapid expansion of livestock, and illegal harvesting point to further deforestation. This study identifies the social and political factors leading to the decline of Albania's forest resource through an examination of relevant information. Then, using the process approach of policy analysis, it assesses the barriers and incentives that impede or distort the intended effect of the current policy implementation. Third, it suggests new policies and/or changes with the aim to manage the forests sustainability and to attract investments in Albanian forestry. Policy issues for areas and sectors important or related to forestry, including agriculture, livestock industry, tourism, and rural development are discussed. Successful implementation of forest policies will be achieved by encompassing all issues pertinent to rural development. The focus is on formulation of forest policy, the evaluation of the current forest law, the role of the statute in the policy process, and guidelines in the preparation of the laws. However, the enactment of laws alone cannot ensure the success of a policy. Special consideration is given to the implementation part of the process, especially interpretation, organization, application; tools (regulations, incentives, taxation), opportunities/constraints, priorities and suggestions for successful implementation. Finally, the topic of evaluation is addressed: its intention, possible analytical techniques and standards of performance, role and expectations of participants and analysts, and major obstacles to an effective evaluation. Recommendations include changes in existing policies to allow the transfer of some state land to private and communal ownership, the expansion of the national parks to include more old-growth forests, and the adoption of concessionaires for the management of the state forests. Other policy proposals, such as a massive reforestation effort, promotion of community-oriented forest management, and forest certification, follow.
Ph. D.

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40

Eckley, Michael C. "Aesthetic Values of Five Primary Wood Transporting Methods Common to Northern New England." Fogler Library, University of Maine, 2004. http://www.library.umaine.edu/theses/pdf/EckleyMC2004.pdf.

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41

McKain, Kathryn. "Carbon accumulation at the Harvard Forest : a comparison of methods for measuring tree biomass for regional extrapolation of the eddy-flux tower footprint /." Connect to online version, 2005. http://ada.mtholyoke.edu/setr/websrc/pdfs/www/2005/100.pdf.

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42

Krogstad, Finn. "Evaluating the validity of research implications /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/5551.

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43

Wolter, Faren R. "Assessing the capacity for collaborative ecosystem stewardship on private forestland in the Missouri Ozarks." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4865.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2007.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on October 15, 2007) Vita. Includes bibliographical references.

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44

Valencia, Niels. "Ecology of forests on the western slopes of the Peruvian Andes." Thesis, University of Aberdeen, 1990. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=128343.

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Dry cloud forests on the western slopes of the Peruvian Andes were mapped from aerial photographs, 306 stands being recorded from 4^o50'S to 12^o47'S. The frequency and area of these stands, as well as most parameters analyzed in the eight sample sites, show a steep decreasing latitudinal trend and are strongly correlated with the latitudinal rainfall gradient. The mean area of the forest stands decreases from 115 ha in northern Peru to 42 ha in central Peru. The number of species recorded decreases along the study area from 52 to 13 and there is a well defined latitudinal sequence of species. Mean density and basal area per hectare of stems ≥10 cm gbh decreases from 2995 individuals and 79.91 m^2 in the north to 500 individuals and 17.27 m^2 in central Peru. The vertical structure is similar throughout the study area, emergent trees reaching on average 22 m and the main canopy 12 m in the north and 13 m and 7 m respectively in central Peru. Regeneration is very active in northern Peru. Juveniles have been found for a high proportion of species, including all common ones, and most species show a logarithmic decline in number of stems with increasing girth. There is a steep decreasing trend towards central Peru, where few species regenerate, mostly shrubs. The pattern found may be the result of the combined effect of grazing and a climatic change towards drier conditions evidenced in the regeneration pattern of most sites.

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45

Moriarty, Kaleen S. "Automated image-to-image rectification for use in change detection analysis as applied to forest clearcut mapping /." Online version of thesis, 1993. http://hdl.handle.net/1850/11738.

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46

Wang, Yujiao. "An analysis of the employment impact of stumpage price increase policy in B.C. /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/5592.

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47

Himes, Jamie Marie. "Treefall gap characteristics within an Appalachian hardwood forest in West Virginia influences of topographic position and forest type /." Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10503.

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Thesis (M.S.)--West Virginia University, 2009.
Title from document title page. Document formatted into pages; contains vi, 68 p. : ill. (some col.), col. maps. Vita. Includes abstract. Includes bibliographical references (p. 61-67).

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48

Kincaid, Joshua A. "Spatial models of forest-environment relationships on the Appalachian Plateaus the Allegheny Mountain section, western Maryland /." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=2090.

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Thesis (M.A.)--West Virginia University, 2001.
Title from document title page. Document formatted into pages; contains vi, 43 p. : map. Includes abstract. Includes bibliographical references (p. 40-43).

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49

Soda, Miho. "Using remote sensing to detect forest change associated with timber processing mills in West Virginia." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=2976.

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Thesis (M.A.)--West Virginia University, 2003.
Title from document title page. Document formatted into pages; contains vi, 18 p. : ill. (some col.), col. map. Includes abstract. Includes bibliographical references (p. 18).

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50

Kamwi, Jonathan Mutau. "The use of high-resolution satellite imagery in forest inventory : a case of Hans Kanyinga Community Forest - Namibia." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019/650.

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Dissertations / Theses on the topic 'Forestry'

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