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Author: P. K. Ramachandran Nair
Publisher: Springer Science & Business Media
ISBN: 9401590087
Category : Technology & Engineering
Languages : en
Pages : 251
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Book Description
Large areas of the warm, humid tropics in Southeast Asia, the Pacific, Latin America, the Caribbean, and Africa are hilly or mountainous. Jackson and Scherr (1995) estimate that these tropical hillside areas are inhabited by 500 million people, or one-tenth of the current world population, many of whom practice subsistence agriculture. The region most affected is Asia which has the lowest area of arable land per capita. Aside from limited areas of irrigated terraces, most of the sloping land, which constitutes 60% to 90% of the land resources in many Southeast Asian countries, has been by-passed in the economic development of the region (Maglinao and Hashim, 1993). Poverty in these areas is often high, in contrast to the relative wealth of irri gated rice farms in lowland areas that benefited from the green revolution. Rapid population growth in some countries is also exacerbating the problems of hillside areas. Increasingly, people are migrating from high-potential lowland areas where land is scarce to more remote hillside areas. Such migra tion, together with inherent high population growth, is forcing a transforma tion in land use from subsistence to permanent agriculture on fragile slopes, and is creating a new suite of social, economic, and environmental problems (Garrity, 1993; Maglinao and Hashim, 1993).
Author: P. K. Ramachandran Nair
Publisher: Springer Science & Business Media
ISBN: 9401590087
Category : Technology & Engineering
Languages : en
Pages : 251
Get Book Here
Book Description
Large areas of the warm, humid tropics in Southeast Asia, the Pacific, Latin America, the Caribbean, and Africa are hilly or mountainous. Jackson and Scherr (1995) estimate that these tropical hillside areas are inhabited by 500 million people, or one-tenth of the current world population, many of whom practice subsistence agriculture. The region most affected is Asia which has the lowest area of arable land per capita. Aside from limited areas of irrigated terraces, most of the sloping land, which constitutes 60% to 90% of the land resources in many Southeast Asian countries, has been by-passed in the economic development of the region (Maglinao and Hashim, 1993). Poverty in these areas is often high, in contrast to the relative wealth of irri gated rice farms in lowland areas that benefited from the green revolution. Rapid population growth in some countries is also exacerbating the problems of hillside areas. Increasingly, people are migrating from high-potential lowland areas where land is scarce to more remote hillside areas. Such migra tion, together with inherent high population growth, is forcing a transforma tion in land use from subsistence to permanent agriculture on fragile slopes, and is creating a new suite of social, economic, and environmental problems (Garrity, 1993; Maglinao and Hashim, 1993).
Author: P. K. R. Nair
Publisher:
ISBN: 9789401590099
Category :
Languages : en
Pages : 258
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Book Description
Author: P. K. R. Nair
Publisher:
ISBN:
Category : Agroforestry
Languages : en
Pages : 262
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Book Description
Acknowledged world leaders in various aspects of tropical agroforestry were invited at a one-day symposium to present state-of-the-art reviews of the developments in their respective research areas
Author: Matti Palo
Publisher: Springer Science & Business Media
ISBN: 9401006644
Category : Technology & Engineering
Languages : en
Pages : 477
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Book Description
In the 1990s the world community has arrived at a particularly in developing countries and in econo historical turning point. Global issues- the decline mies in transition. These three organizations have of biological diversity, climate change, the fate of different backgrounds and focuses, but have found forest peoples, fresh water scarcity, desertification, it relevant and rewarding to their core operations to deforestation and forest degradation - have come collaborate in WFSE activities. The intention of to dominate the public and political debate about these organizations is to continue supporting the forestry. In the economic sphere, forest industries WFSE research and developing the mutual collab have assumed global dimensions. oration. The World Forests, Society and Environment In the year 2000,WFSE took on anewchallenge, Research Program (WFSE) is a response by the re extending its research network to involve five new searchcommunity to thisglobalization. The WFSE Associate Partners: the Center for International slogan 'Globalization calls for global research' re Forestry Research (CIFOR) in Indonesia;the Cent flects both the means and the end of the program. er for Research and Higher Education on Natural The program is involved in promoting and execut Resources of Tropical America (CATIE) in Costa ing research in different parts of the world, and Rica; the International Centerfor Research inAgro through its publications and communications net Forestry (ICRAF) in Kenya; the World Forestry work, linking researchers worldwide.
Author: S.M. Jain
Publisher: Springer Science & Business Media
ISBN: 9401723117
Category : Technology & Engineering
Languages : en
Pages : 521
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Book Description
This two-volume book gives a broad coverage of various aspects of plant molecular biology relevant to the improvement of woody plants. The authors provide background information on genetic engineering and molecular marker techniques, and specific examples of species in which sufficient progress has been made.
Author: Atsushi Yoshimoto
Publisher: Springer Science & Business Media
ISBN: 9401763976
Category : Technology & Engineering
Languages : en
Pages : 365
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Book Description
This book is a collection of papers presented at the international symposium on forest sector analysis held in Miyazaki, Japan, in 1998. It is structured with three themes: understanding global forest sector issues, discussing the contribution of modeling efforts to forest sector analysis, and discussing the role of Japanese forest policy in a global sense. The most important features are the case studies using various types of forest sector models. From a modeling perspective, changes in modeling efforts include more detail of spatial and multiple market levels, intergenerational welfare concerns, non-market valuation issues, and explicit treatment of the uncertainty inherent in both the policy process and in the biophysical systems. The reader of this book will benefit not only from presentation of forest utilization issues in different nations, but also from the interrelatedness of the theory and application of forest sector modeling.
Author: Csaba Mátyás
Publisher: Springer Science & Business Media
ISBN: 9401715769
Category : Technology & Engineering
Languages : en
Pages : 309
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Book Description
During the 4th International Consultation on Forest Genetics and Tree Building, held in 1998 in Beijing, China, leading scientists were invited to review past achievements, to redefine the role of forest genetics and breeding in contemporary forestry, and to set priorities for future research and development. On the basis of the invited presentations, the volume summarizes the state of knowledge in various fields, such as the impact of forest management and of changing environmental conditions on genetic resources, and the value of genetic markers as indicators for adaptational potential, as well as the tasks of conservation. Detailed reports from the different continents provide a comprehensive diagnosis of the global situation of forest genetics and tree breeding research. The book offers not only an overview of contemporary trends and expected future developments, but also identifies current main problems in funding and cooperation. It may prove therefore useful not only for scientists, university lecturers and advanced students in the field of forestry, ecology and conservation biology, but also for decision makers and managers in companies and conservation organizations.
Author: Miguel Altieri
Publisher: CRC Press
ISBN: 1351989405
Category : Technology & Engineering
Languages : en
Pages : 258
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Book Description
Explore the latest research on biological control! Completely updated for 2004, this new edition examines methods for making agricultural systems less susceptible to insect pests. Containing new findings and reports of strategies, Biodiversity and Pest Management in Agroecosystems, Second Edition will show you how pests can be managed by enhancing beneficial biodiversity using agroecological diversification methods. Biodiversity and Pest Management in Agroecosystems, Second Edition provides you with an essential overview of the role of biodiversity in agriculture and then gets specific, with new and updated information on: the agroecology of pest management plant diversity and pest outbreaks within agroecosystems diversification strategies for pest management how sustainable farming systems are designed You'll also explore: the role of plant diversity on the biology of beneficial insects insect regulation in diverse agroecosystems manipulation of plant diversity in agroecosystems ecological and socioeconomic implications The fact is, many modern agroecosystems are unstable as a consequence of constant human intervention in crop systems which ignore ecological principles. With case studies on a variety of crops and pests, Biodiversity and Pest Management in Agroecosystems, Second Edition explores entomological aspects of agriculture and analyzes the ecological basis for the maintenance of biodiversity. It will familiarize you with the theory and practice of enhancing biological pest control in agricultural systems by managing vegetational diversity via multiple cropping, cover cropping, rotations, and other spatial and temporal designs. With studies on intercropping, cover cropping, weed management, and crop-field border vegetation manipulation, this book covers the effects of these diverse systems on pest population density and the mechanisms underlying pest reduction in polycultures. Make it a part of your reference/teaching collection today!
Author: Shri Mohan Jain
Publisher: Springer Science & Business Media
ISBN: 1402029853
Category : Science
Languages : en
Pages : 580
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Book Description
World population is increasing at an alarming rate and this has resulted in increasing tremendously the demand for tree products such as wood for construction materials, fuel and paper, fruits, oils and medicines etc. This has put immense pressure on the world’s supplies of trees and raw material to industry and will continue to do so as long as human population continues to grow. Also, the quality of human diet, especially nutritional components, is adversely affected due to limited genetic improvement of most of fruit trees. Thus there is an immediate need to increase productivity of trees. Improvement has been made through conventional breeding methods, however, conventional breeding is very slow due to long life cycle of trees. A basic strategy in tree improvement is to capture genetic gain through clonal propagation. Clonal propagation via organogenesis is being used for the production of selected elite individual trees. However, the methods are labour intensive, costly, and produce low volumes. Genetic gain can now be captured through somatic embryogenesis. Formation of embryos from somatic cells by a process resembling zygotic embryogenesis is one of the most important features of plants. In 1958, Reinert in Germany and Steward in USA independently reported somatic embryogenesis in carrot cultures. Since then, tremendous progress in somatic embryogenesis of woody and non-woody plants has taken place. It offers a potentially large-scale propagation system for superior clones.
Author: James Reid Boyle
Publisher: Springer Science & Business Media
ISBN: 9401726892
Category : Technology & Engineering
Languages : en
Pages : 468
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Book Description
Planted forests, from irrigated eucalypts in Brazil to Douglas-fir seedlings in the mountains of Oregon, are described and discussed by international experts. The varieties, purposes, forms, and ecological, economic and social aspects of planted forests are considered in technical details and in case studies from temperate and tropical regions of the world.
