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E-bok
PDF, Engelska, 20063 948 kr
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The world’s population is expected to reach 8 billion by 2025 and most of this growth in population will occur in developing countries. To feed the world with such a marked increase in population, a great improvement in food production must be achieved particularly in these countries. To meet this challenge, present agricultural productivity must be increased on the cultivated land. However, in many developing countries, particularly in Africa, reduced soil fertility caused by continuous cropping with low nutrient input and the resultant nutrient mining of soils is a major threat both to food production and to ecosystem viability. As a result of declining soil fertility, together with increasing population pressure, expansion of crop production to marginal lands and forested areas contribute to the destruction of natural ecosystems. Food production is not only a quantitative challenge. Improving the nutrient status of plants provides a further valuable means of enhancing food quality and is of extreme benefit to the health of both plants and humans. There are several excellent examples showing that plants with optimum nutrient status are better adapted to biotic and abiotic stress factors. Because of population pressures, many global food systems are not currently providing enough micronutrients to ensure adequate micronutrient intakes in the human diet. This has resulted in an increasing prevalence of micronutrient deficiencies that now afflicts over three billion people worldwide.
Inbunden, Engelska, 1997
2 155 kr
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This is the first Supplementary volume to Kluwer's highly acclaimed Encyclopaedia of Mathematics. This additional volume contains nearly 600 new entries written by experts and covers developments and topics not included in the already published 10-volume set. These entries have been arranged alphabetically throughout. A detailed index is included in the book. This Supplementary volume enhances the existing 10-volume set. Together, these eleven volumes represent the most authoritative, comprehensive up-to-date Encyclopaedia of Mathematics available.
Inbunden, Engelska, 2001
3 229 kr
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The International Plant Nutrition Colloquium in Hannover was the 14th in a series that started in 1954. Hannover was also selected as the venue of the 7th Colloquium held 27 years ago, in September 1974, under the presidency of J. Wehrmann. This volume is a compilation of extended abstracts of all papers presented at the 14th Colloquium. These papers include two plenary lectures which address the role of plant nutrition in the sustainability of agro-ecosystems and the production of enough high quality food to feed the growing world population. Recent advances in plant nutrition are reviewed in introductory plenary lectures in each of the Symposia devoted to: genetics and molecular biology of plant nutrition, nutrient functions, nutrient uptake and translocation, the role of the apoplast in mineral nutrition, plant quality and plant health, salinity and plant--soil--water relations, mineral element toxicity and resistance nutrient acquisition, soil organisms/plant interactions, fertiliser use in relation to optimum yield and environment, nutrient dynamics in natural and agro-ecosystems, and plant nutrition and sustainable development.Current knowledge and research emphasis in these areas of the subject is well illustrated by more than 500 oral and poster presentations and the reader is provided with a comprehensive view of the state of plant nutrition research worldwide.
Häftad, Engelska, 1965
649 kr
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Balsam Fir was first published in 1965. Minnesota Archive Editions uses digital technology to make long-unavailable books once again accessible, and are published unaltered from the original University of Minnesota Press editions.Professors Bakuzis and Hansen, with the assistance of a number of co-authors of individual chapters, present an exhaustive survey of the literature on the balsam fir, providing a coherent picture of the species and its place in nature and forestry practice. The balsam fir is used extensively in the pulp and paper industry, and it is known to millions as a traditional Christmas tree. In North America it is a major tree species in Canada, in the northeastern United States, and in the Great Lakes region.In the search of the literature, over 2000 sources were consulted and considerably more than half of them are cited in the book. The references, organized in an ecological framework, cover the period from the seventeenth century to the present. The authors have reviewed and integrated these data in a unified, but multipurposed, book. In the integration of the source material the authors also made contributions of their own. The book contains the following chapters: Botanical Foundations, Geography and Synecology, Ecological Factors, Microbiology, Entomology, Reproduction, Stand Development, Growth and Yield, and Utilization. Appendixes list fungi and myxomycetes and insects associated with balsam fir. There are 30 illustrations, including a frontispiece drawing by the noted nature artist Francis Lee Jaques.The book will appeal to a wide range of readers specifically concerned with forestry, including research workers, educators, entomologists, pathologists, and managing foresters, as well as conservationists and wildlife biologist in general.
Häftad, Engelska
152 kr
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Inbunden, Engelska, 2021
401 kr
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Häftad, Engelska, 2021
231 kr
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Inbunden, Engelska, 2023
370 kr
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Häftad, Engelska, 2023
179 kr
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Häftad, Engelska, 2011
300 kr
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Häftad, Engelska, 2011
268 kr
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Häftad, Engelska, 2011
294 kr
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Häftad, Engelska, 2010
263 kr
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E-bok
PDF, Engelska, 2013712 kr
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Volume V deals with the problems of turnover in the nervous system. "Turnover" is defined in different ways, and the term is used in different contexts. It is used rather broadly in the present volume, and intentionally so. The turnover of macromolecules is only one aspect; here "turnover" in dicates the simultaneous and coordinated formation and breakdown of macromolecular species. The complexities of cerebral protein turnover are shown in aseparate chapter dealing with the synthesis ofproteins, in another on breakdown, and in still another on the relationship ofthese two (showing how the two halves of turnover are controlled). The fact that most likely the two halves of protein turnover, synthesis and breakdown, are separated spatially and the mechanisms involved are different further emphasizes the complexity of macromolecular turnover. "Turnover" is used in a different context when the turnover of a cycle is discussed; but he re again a number of complex metabolic reactions have to be interrelated and controlled; some such cycles are discussed briefly in this volume, additional cycles have been discussed with metabolism, and some cycles still await elucidation or discovery.
Häftad, Engelska, 2013
544 kr
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Volume V deals with the problems of turnover in the nervous system. "Turnover" is defined in different ways, and the term is used in different contexts. It is used rather broadly in the present volume, and intentionally so. The turnover of macromolecules is only one aspect; here "turnover" in dicates the simultaneous and coordinated formation and breakdown of macromolecular species. The complexities of cerebral protein turnover are shown in aseparate chapter dealing with the synthesis ofproteins, in another on breakdown, and in still another on the relationship ofthese two (showing how the two halves of turnover are controlled). The fact that most likely the two halves of protein turnover, synthesis and breakdown, are separated spatially and the mechanisms involved are different further emphasizes the complexity of macromolecular turnover. "Turnover" is used in a different context when the turnover of a cycle is discussed; but he re again a number of complex metabolic reactions have to be interrelated and controlled; some such cycles are discussed briefly in this volume, additional cycles have been discussed with metabolism, and some cycles still await elucidation or discovery.
Häftad, Engelska, 2012
544 kr
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This book contains the proceedings of a symposium held at the College of Charleston. Charleston. South Carolina. USA. 16-20 June. 1986. The seed for this symposium arose from a group of physiologists. soil scientists and biochemists that met in Leningrad USSR in July 1975 at the 12th Botanical Conference in a Session organized by Professor B.B. Vartepetian. This group and others later conspired to contribute to a book entitled Plant Life in Anaerobic Environments (eds. D.D. Hook and R.M.M. Crawford. Ann Arbor Science. 1978). Several contributors to the book suggested in 1983 that a broad-scoped symposium on wetlands would be useful (a) in facilitating communication among the diverse research groups involved in wetlands research (b) in bringing researchers and managers together (c) and in presenting a comprehensive and balanced coverage on the status of ecology and management of wetlands from a global perspective. With this encouragement. the senior editor organized a planning committee that encompassed expertise from many disciplines of wetland scientists and managers. This committee, with input from their colleagues around the world, organized a symposium that addressed almost every aspect of wetland ecology and management.
Häftad, Engelska, 2014
544 kr
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This book contains the proceedings of a symposium held at the College of Charleston, Charleston, South Carolina, USA, 16-20 June 1986. The seed for this symposium arose from a group of physiologists, soil scientists and biochemists that met in Leningrad, USSR in July 1975 at the 12th Botanical Conference in a Session organized by Professor B. B • Vartepetian. This group and others later conspired to contribute to a book entitled Plant Life in Anaerobic Environments (eds. D.D. Hook and R.M.M. Crawford, Ann Arbor Science, 1978). Several contributors to the book suggested in 1983 that a broad-scoped symposium on wetlands would be useful (a) in facilitating communication among the diverse research groups involved in wetlands research (b) in bringing researchers and managers together and (c) in presenting a com-: prehensive and balanced coverage on the status of ecology and management of wetlands from a global perspective. With this encouragement, the senior editor organized a Plan ning Committee that encompassed expertise from many disciplines of wetland scientists and managers. This Committee, with input from their colleagues around the world, organized a symposium that addressed almost every aspect of wetland ecology and management.
E-bok
PDF, Engelska, 20121 416 kr
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This book contains the proceedings of a symposium held at the College of Charleston, Charleston, South Carolina, USA, 16-20 June 1986. The seed for this symposium arose from a group of physiologists , soU scientists and biochemists that met in Leningrad, USSR in July 1975 at the 12th Botanical Conference in a Session organized by Professor B.B. Vartepetian. This group and others later conspired to contribute to a book entitled Plant Life in Anaerobic Environments (eds. D. D. Hook and R. M. M. Crawford, Ann Arbor Science, 1978). Several contributors to the book suggested in 1983 that a broad-scoped symposium on wetlands would be useful (a) in facilitating communication among the diverse research groups involved in wetlands research (b) in bringing researchers and managers together and (c) in presenting a com prehensive and balanced coverage on the status of ecology ami management of wetlands from a global perspective. With this encouragement, the senior editor organized a Plan ning Committee that encompassed expertise from many disciplines of wetland scientists and managers. This Committee, with input from their colleagues around the world, organized a symposium that addressed almost every aspect of wetland ecology and management.
Häftad, Engelska, 2012
1 081 kr
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This book contains the proceedings of a symposium held at the College of Charleston, Charleston, South Carolina, USA, 16-20 June 1986. The seed for this symposium arose from a group of physiologists , soU scientists and biochemists that met in Leningrad, USSR in July 1975 at the 12th Botanical Conference in a Session organized by Professor B.B. Vartepetian. This group and others later conspired to contribute to a book entitled Plant Life in Anaerobic Environments (eds. D. D. Hook and R. M. M. Crawford, Ann Arbor Science, 1978). Several contributors to the book suggested in 1983 that a broad-scoped symposium on wetlands would be useful (a) in facilitating communication among the diverse research groups involved in wetlands research (b) in bringing researchers and managers together and (c) in presenting a com prehensive and balanced coverage on the status of ecology ami management of wetlands from a global perspective. With this encouragement, the senior editor organized a Plan ning Committee that encompassed expertise from many disciplines of wetland scientists and managers. This Committee, with input from their colleagues around the world, organized a symposium that addressed almost every aspect of wetland ecology and management.
Häftad, Engelska
241 kr
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347 kr
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Häftad, Engelska, 2019
917 kr
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An introduction is provided to the present state of knowledge of beetle families and their larvae in the British Isles and relevant larval identification literature. Summaries are given of general larval morphology; specialised biological aspects such as hypermetamorphosis and parasitism; habitats and behaviour as aids to identification, especially of those species in which adults and larvae occupy totally different habitats and in which one or other stage is much more commonly encountered; pest species and biological control; and collecting, preservation and rearing. Illustrated keys are provided to distinguish beetle larvae from those belonging to other insect orders, and to families of Coleoptera larvae. Colour photographs of beetle larvae representing many of the families discussed, and using specimens from the van Emden collection, are provided.
E-bok
PDF, Engelska, 20091 029 kr
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A one-stop Desk Reference, for engineers involved in all aspects of aerospace; this is a book that will not gather dust on the shelf. It brings together the essential professional reference content from leading international contributors in the field. Material covers a broad topic range from Structural Components of Aircraft, Design and Airworthiness to Aerodynamics and Modelling* A fully searchable Mega Reference Ebook, providing all the essential material needed by Aerospace Engineers on a day-to-day basis. * Fundamentals, key techniques, engineering best practice and rules-of-thumb together in one quick-reference.* Over 2,500 pages of reference material, including over 1,500 pages not included in the print edition
Häftad, Engelska, 2018
140 kr
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Inbunden, Engelska, 2026
309 kr
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Del 16 - Early European Research
Historiography and the Shaping of Regional Identity in Europe
Regions in Clio's Looking Glass
Inbunden, Engelska, 2020
1 402 kr
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E-bok
PDF, Tyska, 20221 461 kr
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Keine ausfuhrliche Beschreibung fur "e;DATHE: ATLAS VERBR. PALAEARKT. VOGEL LFG 8 AVPVV E-BOOK"e; verfugbar.
Häftad, Engelska, 1964
560 kr
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