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Author: Roelof A.A. Oldeman
Publisher: Springer Science & Business Media
ISBN: 9401736103
Category : Technology & Engineering
Languages : en
Pages : 571
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Book Description
Roelof A. A. Oldeman Tropical hardwoods are one of the essential cogs in the complex socio-economic machinery keeping alive an ever-increasing humanity with steadily rising claims upon a finite-resource environment. Their position in this context at first sight seems to be analogous to that of other commodities, such as rubber, metals, mineral oil, tropical fruits and many more. Looking closer, however, tropical hardwoods occupy a special place. Their vast majority, unlike tropical crops, still comes forth from natural forests being exploited by man. This exploitation straight from the natural resource is something they have in common with oil and metals, but the fact that they grow in living systems places them closer to crops. Natural forest ecosystems are not renewable. Timber producing trees, however, can be made into a renewable resource on condition that ways and means are found to cultivate them as a crop. be understood as a socio-economic The tropical hardwood situation can best chain, with the resource base at one end, the consumer community at the other and everything that has to do with the market in the middle. Now, at the resource side, the economics of tropical hardwood extraction barely got out of the primeval ways of wood-gathering by hand and by axe, which were still predominant in the nineteen-forties. There, the offer of natural products was so immense and so near to hand that no care had to be taken of the resource.
Author: Roelof A.A. Oldeman
Publisher: Springer Science & Business Media
ISBN: 9401736103
Category : Technology & Engineering
Languages : en
Pages : 571
Get Book Here
Book Description
Roelof A. A. Oldeman Tropical hardwoods are one of the essential cogs in the complex socio-economic machinery keeping alive an ever-increasing humanity with steadily rising claims upon a finite-resource environment. Their position in this context at first sight seems to be analogous to that of other commodities, such as rubber, metals, mineral oil, tropical fruits and many more. Looking closer, however, tropical hardwoods occupy a special place. Their vast majority, unlike tropical crops, still comes forth from natural forests being exploited by man. This exploitation straight from the natural resource is something they have in common with oil and metals, but the fact that they grow in living systems places them closer to crops. Natural forest ecosystems are not renewable. Timber producing trees, however, can be made into a renewable resource on condition that ways and means are found to cultivate them as a crop. be understood as a socio-economic The tropical hardwood situation can best chain, with the resource base at one end, the consumer community at the other and everything that has to do with the market in the middle. Now, at the resource side, the economics of tropical hardwood extraction barely got out of the primeval ways of wood-gathering by hand and by axe, which were still predominant in the nineteen-forties. There, the offer of natural products was so immense and so near to hand that no care had to be taken of the resource.
Author: Roelof A. A. Oldeman
Publisher:
ISBN: 9789401736114
Category :
Languages : en
Pages : 608
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Book Description
Author: B. Sundberg
Publisher: Springer Science & Business Media
ISBN: 9401705046
Category : Technology & Engineering
Languages : en
Pages : 229
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Book Description
It is our conviction - based on many years of teaching and practical experience - that professional skill in forestry will develop more rea dily and more efficiently if forestry students are presented with a clear understanding, at an early stage, of the impact of the physical factors that both enhance and inhibit forestry activities. Tnis know ledge is best aquired by adressing the physical world of forestry with a set of analytical tools through which an almost infinite number of variables can be listed in order, be measured and their interaction be explored and resolved. This is the main purpose of this joint effort, presented in two volumes, Part I and Part II. Part I is analytic, written as a basic text for undergraduates in cour ses such as logging, transport, forest engineering and even forest ma nagement. It deals with the fundamentals of technology in forestry as determined by the physical environment. Briefly it can be visualized as the application of forestry wi thin the parameters: space, time and energy. Forestry is a process with a long time horizon. Free solar energy creates biomass which, with the aid of other forms of energy, is converted into products and services. A knowledge of the dependecies and interactions is indiGpensible for the forestry profession. The analytic approach serves two purposes: to bring about a clear un derstanding of the real world of forest and to develop tools through which efficiency and productivity can be explored and improved.
Author: T.C. Hennessey
Publisher: Springer Science & Business Media
ISBN: 9400944241
Category : Nature
Languages : en
Pages : 241
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Book Description
Maintaining or increasing stand productivity is the concern of forest land managers worldwide. Consequently, there is increasing interest in understanding the impact of environmental stress on productivity and the development of management strategies that ameliorate or reduce the deleterious effects. Invited scientists gathered in Fort Collins, Colorado on July 30, 1985, to present the current state of knowledge regarding the impact of environmental stress on forest stand productivity. Particular attention was given to elucidating the mode of action by which individual stress elements reduce productivity. Environmental factors and the levels that constitute stressed (suboptimal) conditions in forest stands were identified, and the effects of stress intensity and duration on key stand parameters, including photosynthesis, respiration, assimilate partitioning, senescence and mortality, were emphasized. The role of genetics and silvicultural treatments in lessening the stress impact on stand productivity was presented, particularly in regards to alternative methods for environmental stress management. Modeling of stand dynamics in response to environmental stress was explored as an effective research and management tool. VIII Improved forest management practices will develop as we improve our understanding of the nature of important environmental stresses and as we comprehend their impact on tree and stand performance, manifested through physiological processes and genetic potential. This book is dedicated to such an understanding and comprehension.
Author: B. Gessel
Publisher: Springer Science & Business Media
ISBN: 9400943806
Category : Technology & Engineering
Languages : en
Pages : 263
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Book Description
A knowledge of forest site and forest productivity variables is fundamental to sound forest practice everywhere. The ability to identify sites and site problems correctly and manipulate productivity variables for maintenance or improvement of productivity is the basis of modern forest management. Although the basic facts regarding forest site and productivity apply throughout the world, the application of information and the response to manipulation vary greatly and depend on local forest conditions. The September 1981 World Congress of the International Union of Forest Research Organizations (IUFRO) in Kyoto, Japan was the occasion for the special meeting on Forest Site and Productivity sponsored by the IUFRO Site Group Sl.02. This meeting brought together forest site and productivity researchers from across the world to review current thought and the state of site research. Information not ordinarily available in one place was presented at this meeting. As organizer of the session, I decided to attempt to publish the papers in one volume. Arrangements were made with a publisher, Martinus Nijhoff, and also with the authors. The process of publication has taken longer than desirable, but the volume does appear at an opportune time coincident with the 1986 IUFRO World Congress in Yugoslavia. Material contained in this publication will set the stage for Site Group discussions at the 1986 meeting. This volume assembles the thought of forest research workers from many different countries and therefore many different kinds of forests.
Author: I. Samset
Publisher: Springer Science & Business Media
ISBN: 9401736847
Category : Technology & Engineering
Languages : en
Pages : 537
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Book Description
The book is a civil engineering handbook on winch and cable systems. The handbook may be used as textbook for university studies in civil engineering and forestry and as the basis for studies in schools on a technical level. It should be a useful reference book for construction engineers, civil engineers, logging engineers, foresters and leaders of operational activities under difficult terrain conditions. The content in the book is based on more than 35 years experience with practical winch and cable operations. As a leader of the Norwegian Institute of Forest Operations, the author has carried out research work in this field since 1947. The Institute is the owner of yarders, winches, cable cranes etc., and with its own cable crews the Institute operates as a contractor in its own research forests as well as in other state or privately owned forests throughout Norway. The research work also includes other cable crane operations in Norway and other countries. As the leader of the Joint FAO/ECE/ILO Study Group on Mechanized Forest Operations the author studied cable operations in most of the Eastern and Western European countries. As president of the International Union of Forestry Research Organizations the author visited most forest countries in the world. Information from research and practical cable crane operations were collected. The handbook is based on material on winch and cable systems used in Japan, New Zealand, Soviet Union, Central Europe, Northern Europe, Eastern United States, Western United States and British Columbia.
Author: Rolfe A. Leary
Publisher: Springer Science & Business Media
ISBN: 9400951515
Category : Technology & Engineering
Languages : en
Pages : 225
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Book Description
As J understand it, a book Preface is where the author explains to the reader how the book in hand came about, something of the personal reasons for having inflicted such extended duress on one's self to complete the manllscript. and other items that are fit to say but do not fit in the text. This book had its conceptual beginnings in the 1970's wit h my 'studies in scientific synthesis at the North Central Forest Experiment Station, St. Paul, Minnesota. Ours is, clearly, the age of analysis. But, I felt, we must soon begin frameworks for synthesis, or a synthesis would never be possible. In short, I hoped to develop 'interaction' as an integrative principle in forestry. As work progressed on the manuscript, other subthemes developed. First, there was the vague feeling on my part that the forestry profession was losing ground in the contest to see who should manage the forests of the world. This was happening not because foresters do not know how to manage forests in a reasonable manner, but because the public seemed to be loosing faith in the judgement of foresters as professional, responsible, wise land managers. Several well-known incidents of poor judgement in timber harvesting methods on national forests in the United States did little to help the forester's image.
Author: K.R. Shepherd
Publisher: Springer Science & Business Media
ISBN: 9400944462
Category : Technology & Engineering
Languages : en
Pages : 334
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Book Description
Plantations of a wide range of tree species have assumed an important place in our world, providing wood for industry, fuelwood and animal fodder, protection from adverse environments and for the soil, as well as amenity and aesthetically pleasing landscapes. silvicultural knowledge of this particular branch of forestry first developed in Europe more than two centuries ago but in many parts of the world is still in a process of rapid evolution as more and more plantations are established to meet specific needs. The first exotic tree species to be established in plantations in my own country were planted more than a century ago and, likewise, New Zealand has a long history of planting. Both countries have developed a vigorous and innovative approach to plantation practice, soundly based initially on European experience but gradually modified to meet the challenges of new environments, new markets, and changed economic circumstances. This book on plantation silviculture was begun some years ago when the lack of a suitable undergraduate text for teaching purposes became apparent. The present text is aimed essentially at this audience. Although I have drawn heavily on the experience of Australia and New Zealand, the principles outlined are applicable anywhere in the world where plantations are being grown and tended, from the United States and Scandinavia to India, South Africa or Brazil. The text should also serve as a useful reference to advanced students and practicing foresters, with the reference list providing an introduction to the literature on this subject.
Author: Humphrey J. Welch
Publisher: Springer Science & Business Media
ISBN: 9401137048
Category : Technology & Engineering
Languages : en
Pages : 445
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Book Description
The research that has culminated in the pUblication being introduced . worldwide) save by one or two of this Manual was in the first place undertaken private conifer enthusiasts. My own efforts at 1 for a new edition of the book Manual of Cultivated recording data at Devizes made possible the Conifers by P. den Ouden and Dr B. K. Boom appearance in 1979 of a larger book: Manual of (both now deceased), published in 1965. Dwarf Conifers. That book was clearly in effect The claim in that book to have included every a partial up-dating of the den Ouden and Boom cultivar published since 1753 was not entirely book under revision, so the decision was made realised, and the stated objective, i. e. that the book to produce an entirely new work, with the present should serve as a basis for the international register title and with the following objectives. that was even at that date under consideration required a lot of space to be devoted to quite 1. To bring the taxonomy into line with current archaic information. practice. Each of the authors of the Manual of Cultivated 2. To extend the species descriptions and make them (by the use of side headings) more easy Conifers was well qualified for the task. P. den Ouden had been systematically collecting conifer to use. 3. To supply some form of 'keys'.
Author: Tran Van Nao
Publisher: Springer Science & Business Media
ISBN: 9401715742
Category : Technology & Engineering
Languages : en
Pages : 239
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Book Description
Tran Van Nao (Editor) The last decade has witnessed a seriously increasing incidence of forest fires in many countries. Substantial economic and ecological losses have been incurred, although the estimation of total damage This has been due to the lack assessment has often been inaccurate. of standardized methods for collecting data on fire occurrence and area burnt, as well as information such as the value of the vegetation destroyed and restoration costs, and the implications for recreation, tourism and other social activities. The Mediterranean region was initially considered one of the most vulnerable to forest fires because of its' dry climate and strong winds. No region is immune to forest fires, however, and damage has been especially severe in areas where pine is the predominant species. Although forest fires are normally considered a national problem, they become an international one when they occur in border area forests or when the ecological impacts are felt over long distances. The potential for forest fires exists in every country -unless it is a complete desert - and for this reason, there is a need to promote better understanding of the fires, and closer cooperation between countries in controlling them.
