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Author: Bruce J. Zobel
Publisher: Springer Science & Business Media
ISBN: 3642721265
Category : Technology & Engineering
Languages : en
Pages : 311
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Book Description
The trend in forestry is toward shorter rotations and more complete utiliza tion of trees. The reasons are: (1) financial pressures to obtain rapid returns on the forestry investment made possible by an earlier harvest; (2) enforced harvest of young plantations to maintain a continuing supply of cellulose for mills where wood shortages are experienced; (3) thinning young plantations, both because they were planted too densely initially and because thinning is done where long rotation quality trees are the forestry goal; (4) more intensive utilization is being done using tops and small diameter trees; and (5) there is interest in using young (juvenile) wood for special products because of its unique characteristics and the development of new technologies. The largest present-day source of conifer juvenile wood is from thinnings of plantations where millions of hectares of pine were planted too densely. Because of the better growth rate resulting from improved silviculture and good genetic stock, plantations will need to be thinned heavily. As a result of this trend, young wood makes up an increasingly larger proportion of the total conifer wood supply each year. Large amounts of juvenile wood from hard woods are also currently available, especially in the tropics and subtropics, because of the fast growth rate of the species used, which results in shorter rotations and ess~ntially all juvenile wood.
Author: Bruce J. Zobel
Publisher: Springer Science & Business Media
ISBN: 3642721265
Category : Technology & Engineering
Languages : en
Pages : 311
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Book Description
The trend in forestry is toward shorter rotations and more complete utiliza tion of trees. The reasons are: (1) financial pressures to obtain rapid returns on the forestry investment made possible by an earlier harvest; (2) enforced harvest of young plantations to maintain a continuing supply of cellulose for mills where wood shortages are experienced; (3) thinning young plantations, both because they were planted too densely initially and because thinning is done where long rotation quality trees are the forestry goal; (4) more intensive utilization is being done using tops and small diameter trees; and (5) there is interest in using young (juvenile) wood for special products because of its unique characteristics and the development of new technologies. The largest present-day source of conifer juvenile wood is from thinnings of plantations where millions of hectares of pine were planted too densely. Because of the better growth rate resulting from improved silviculture and good genetic stock, plantations will need to be thinned heavily. As a result of this trend, young wood makes up an increasingly larger proportion of the total conifer wood supply each year. Large amounts of juvenile wood from hard woods are also currently available, especially in the tropics and subtropics, because of the fast growth rate of the species used, which results in shorter rotations and ess~ntially all juvenile wood.
Author: William Noyes
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 320
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Book Description
Author: Ken Mudge
Publisher: Chelsea Green Publishing
ISBN: 1603585079
Category : Gardening
Languages : en
Pages : 386
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Book Description
Learn how to fill forests with food by viewing agriculture from a remarkably different perspective: that a healthy forest can be maintained while growing a wide range of food, medicinal, and other nontimber products. The practices of forestry and farming are often seen as mutually exclusive, because in the modern world, agriculture involves open fields, straight rows, and machinery to grow crops, while forests are reserved primarily for timber and firewood harvesting. In Farming the Woods, authors Ken Mudge and Steve Gabriel demonstrate that it doesn’t have to be an either-or scenario, but a complementary one; forest farms can be most productive in places where the plow is not: on steep slopes and in shallow soils. Forest farming is an invaluable practice to integrate into any farm or homestead, especially as the need for unique value-added products and supplemental income becomes increasingly important for farmers. Many of the daily indulgences we take for granted, such as coffee, chocolate, and many tropical fruits, all originate in forest ecosystems. But few know that such abundance is also available in the cool temperate forests of North America. Farming the Woods covers in detail how to cultivate, harvest, and market high-value nontimber forest crops such as American ginseng, shiitake mushrooms, ramps (wild leeks), maple syrup, fruit and nut trees, ornamentals, and more. Along with profiles of forest farmers from around the country, readers are also provided comprehensive information on: • historical perspectives of forest farming; • mimicking the forest in a changing climate; • cultivation of medicinal crops; • cultivation of food crops; • creating a forest nursery; • harvesting and utilizing wood products; • the role of animals in the forest farm; and, • how to design your forest farm and manage it once it’s established. Farming the Woods is an essential book for farmers and gardeners who have access to an established woodland, are looking for productive ways to manage it, and are interested in incorporating aspects of agroforestry, permaculture, forest gardening, and sustainable woodlot management into the concept of a whole-farm organism.
Author: Rubin Shmulsky
Publisher: John Wiley & Sons
ISBN: 111942643X
Category : Science
Languages : en
Pages : 504
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Book Description
The updated seventh edition of the classic text on wood science and forestry The seventh edition of Forest Products and Wood Science: An Introduction offers a fully revised and updated review of the forest products industry. This classic text contains a comprehensive review of the subject and presents a thorough understanding of the anatomical and physical nature of wood. The authors emphasize its use as an industrial raw material. Forest Products and Wood Science provides thorough coverage of all aspects of wood science and industry, ranging from tree growth and wood anatomy to a variety of economically important wood products, along with their applications and performance. The text explores global raw materials, the increasing use of wood as a source of energy and chemicals and environmental implications of the use of wood. This edition features new material on structural composites, non-structural composites, durability and protection, pulp and paper, energy and chemicals, and global raw materials. This seventh edition of the classic work: Contains new information on a variety of topics including: structural composites, non-structural composites, durability and protection, pulp and paper, energy and chemicals and global raw materials Includes a fully revised text that meets the changing needs of the forestry, engineering, and wood science academics and professionals Presents material written by authors with broad experience in both the private and academic sectors Written for undergraduate students in forestry, natural resources, engineering, and wood science, as well as forest industry personnel, engineers, wood-based manufacturing and using professionals, the seventh edition of Forest Products and Wood Science updates the classic text that has become an indispensable resource.
Author: Patrick D. Miles
Publisher:
ISBN:
Category : Specific gravity
Languages : en
Pages : 40
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Book Description
Much information is available for specific gravity and other properties of wood and bark, but it is widely scattered in the literature. This paper compiles information for estimation of biomass for 156 tree species found in North America for use in national forest inventory applications. We present specific gravities based on average green volume as well as 12 percent moisture content volume for calculation of oven-dry biomass. Additional information is included on bark thickness, bark voids, and bark percentages by species and green and dry weight of wood and bark. --
Author: Meng Zhang
Publisher: University of Washington Press
ISBN: 0295748885
Category : History
Languages : en
Pages : 282
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Book Description
In the Qing period (1644–1912), China's population tripled, and the flurry of new development generated unprecedented demand for timber. Standard environmental histories have often depicted this as an era of reckless deforestation, akin to the resource misuse that devastated European forests at the same time. This comprehensive new study shows that the reality was more complex: as old-growth forests were cut down, new economic arrangements emerged to develop renewable timber resources. Historian Meng Zhang traces the trade routes that connected population centers of the Lower Yangzi Delta to timber supplies on China's southwestern frontier. She documents innovative property rights systems and economic incentives that convinced landowners to invest years in growing trees. Delving into rare archives to reconstruct business histories, she considers both the formal legal mechanisms and the informal interactions that helped balance economic profit with environmental management. Of driving concern were questions of sustainability: How to maintain a reliable source of timber across decades and centuries? And how to sustain a business network across a thousand miles? This carefully constructed study makes a major contribution to Chinese economic and environmental history and to world-historical discourses on resource management, early modern commercialization, and sustainable development.
Author: John Perlin
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author: Chris Maser
Publisher: CRC Press
ISBN:
Category : Business & Economics
Languages : en
Pages : 224
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Book Description
"This is a very readable book in which the ecological concepts are carefully explained and the glossary of key terms will be a welcome inclusion for those getting to grips with ecology. The book will therefore appeal to a wide readership of aquatic ecologists and foresters, both professional and amateur alike". Scottish Forestry Royal Scottish Forestry Society"...the book makes a very significant contribution to our growing awareness of the ecological importance of driftwood. This contribution is founded on two particular aspects of the book: the writing style, which is clear and directed very much at the general reader; and the scope of the book, which is very broad and, to my knowledge, goes far beyond other reviews of the topic". Angela Gurnell School of Geography, University of Birmingham British Journal of Forestry"This is not a review article containing a current review of all works on wood in aquatic ecosystems. Instead, it is a comprehensive treatment of the general role of wood". J.L. Tank and J.R. Webster Journal of the North American Benthological SocietyFrom the Forest to the Sea: The Ecology of Wood in Streams, Rivers, Estuaries and Oceans is a fascinating scientific work that discusses the role wood plays in very complex and diverse aquatic ecosystems. Until now almost nothing has been published on this little understood topic.-- European settlement and laissez-faire capitalism-- Streams-- The Sea-- The Sea and estuaries-- Rivers
Author: Claude Vidal
Publisher: Springer
ISBN: 3319440152
Category : Technology & Engineering
Languages : en
Pages : 847
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Book Description
The book presents the current state and good practices of national forest inventories in monitoring wood resources and demonstrates pathways for harmonisation and improved common reporting. Beyond a general overview over availability and use of wood resources in different countries, it provides a unique collection of original contributions from national forest inventory experts with in-depth descriptions of current NFI methods in assessing wood availability and wood use in European countries, and selected countries from America and Asia.The main topics are national definitions and improvements in common reporting of forests available for wood supply, stem quality and assortments, estimation of change including growth and drain, and tree resources outside forest land. The book is a must-have for everyone who is contributing to national forest inventories either methodologically or operatively, for people who want or need to understand national forest inventory provided data and information on the availability of wood resources. By providing profound knowledge it is a valuable basis for scientists involved in scenario modelling and analysing effects of climate change, as well as individuals in private organisations and public administrations promoting the sustainable use of natural resources and the potential of green economy.
Author: Christian Cossalter
Publisher: CIFOR
ISBN: 9793361638
Category :
Languages : ja
Pages : 66
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Book Description
A brief history of plantations. Environmental issues. Plantations and biodiversity. Water matters. Plantations and the soil. Pests: plantations' achilles' heel? Genetically modified trees: opportunity or treath? Plantations and global warming. Social issues. Employement: a contested balance sheet. Land tenure and conflict. Economic issues. Spiralling demand. Incentives and subsidies. Economies of scale. Costing the earth.
