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51 produkter
51 produkter
1 958 kr
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594 kr
Skickas inom 3-6 vardagar
1 720 kr
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1 763 kr
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United States-Canadian Tables of Feed Composition
Nutritional Data for United States and Canadian Feeds, Third Revision
Häftad, Engelska, 1982
1 763 kr
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1 671 kr
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1 826 kr
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1 925 kr
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Genetic Engineering of Plants
Agricultural Research Opportunities and Policy Concerns
Häftad, Engelska, 1984
1 671 kr
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"The book ...is, in fact, a short text on the many practical problems ...associated with translating the explosion in basic biotechnological research into the next Green Revolution," explains Economic Botany. The book is "a concise and accurate narrative, that also manages to be interesting and personal ...a splendid little book." Biotechnology states, "Because of the clarity with which it is written, this thin volume makes a major contribution to improving public understanding of genetic engineering's potential for enlarging the world's food supply ...and can be profitably read by practically anyone interested in application of molecular biology to improvement of productivity in agriculture."
2 435 kr
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Based on a symposium sponsored by the Board on Agriculture, this comprehensive book explores the problem of pesticide resistance; suggests new approaches to monitor, control, or prevent resistance; and identifies the changes in public policy necessary to protect crops and human health from the ravages of pests. The volume synthesizes the most recent information from a wide range of disciplines, including entomology, genetics, plant pathology, biochemistry, economics, and public policy. It also suggests research avenues that would indicate how to counter future problems. A glossary provides the reader with additional guidance.
1 636 kr
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This new volume is the first independent analysis of an important national data base, the National Resources Inventory. It cites potential uses of the NRI in controlling soil erosion; determining land use; deciding conservation treatment; classifying soils; and protecting groundwater quality. Methods for soil conservation activities, ranging from the ranking of the lands most susceptible to erosion to the measurement and prediction of both wind and water erosion, are recommended throughout the volume.
1 890 kr
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Written by the foremost authorities in the field, this volume brings together the technical papers from which Volume 1 is drawn. The 10 papers and discussion from a National Research Council symposium cover such topics as soil erosion classification, evaluating how soil erosion damages productivity, calculating soil erosion, understanding ephemeral gully erosion, wind erosion, and the impact of range erosion on land use.
1 717 kr
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Pesticides in groundwater can contaminate drinking water and threaten the health of communities. How does this contamination occur and what should be done about this pressing problem? This new book uses a case-study approach to describe the discovery of the problem in four major agricultural states, to summarize the most recent data on the problem, and to review the status of the problem from both technological and policy perspectives. It also addresses the controversial questions of what levels of residues are acceptable, who should bear the costs of drinking water that is already contaminated, and how federal scientific resources can best be used to aid state initiatives in addressing this problem.
1 694 kr
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How much do animals eat? Why do eating patterns change? How do physiological, dietary, and environmental factors affect feed intake? This volume, a comprehensive overview of the latest animal feed intake research, answers these questions with detailed information about the feeding patterns of fishes, pigs, poultry, dairy cows, beef cattle, and sheep. Equations for calculating predicted feed intake are presented for each animal and are accompanied by charts, graphs, and tables.
1 717 kr
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Many feedstuffs and forages do not provide the dietary vitamins necessary for optimum growth and development, making supplementation necessary. This volume offers a practical, well-organized guide to safe levels of vitamin supplementation in all major domestic species, including poultry, cattle, sheep, and fishes. Fourteen essential vitamins are discussed with information on requirements in various species, deficiency symptoms, metabolism, indications of hypervitaminosis, and safe dosages.
2 029 kr
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Concern about health effects from exposure to pesticides in foods is growing as scientists learn more about the toxic properties of pesticides. The Delaney Clause, a provision of the Food, Drug and Cosmetic Act, prohibits tolerances for any pesticide that causes cancer in test animals or in humans if the pesticide concentrates in processed food or feeds. This volume examines the impacts of the Delaney Clause on agricultural innovation and on the public's dietary exposure to potentially carcinogenic pesticide residues. Four regulatory scenarios are described to illustrate the effects of varying approaches to managing oncogenic pesticide residues in food.
1 890 kr
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This lively book examines recent trends in animal product consumption and diet; reviews industry efforts, policies, and programs aimed at improving the nutritional attributes of animal products; and offers suggestions for further research. In addition, the volume reviews dietary and health recommendations from major health organizations and notes specific target levels for nutrients.
1 890 kr
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This lively book examines recent trends in animal product consumption and diet; reviews industry efforts, policies, and programs aimed at improving the nutritional attributes of animal products; and offers suggestions for further research. In addition, the volume reviews dietary and health recommendations from major health organizations and notes specific target levels for nutrients.
1 671 kr
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This book responds to the widespread recognition among experts that our educational system needs to change in order to provide the skills and knowledge necessary to ensure the future vitality of U.S. agriculture. Understanding Agriculture focuses on agricultural literacy (education about agriculture) and vocational agricultural education (education in agriculture). The section on agricultural literacy addresses the teaching of science through agriculture, teacher education and training, model educational programs, community support, and agricultural career exploration programs. Vocational agricultural education is examined in terms of program enrollment, availability and content, supervised occupational experiences, the Future Farmers of America program, and teacher education and supply.
1 763 kr
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More and more farmers are adopting a diverse range of alternative practices designed to reduce dependence on synthetic chemical pesticides, fertilizers, and antibiotics; cut costs; increase profits; and reduce the adverse environmental consequences of agricultural production. Alternative Agriculture describes the increased use of these new practices and other changes in agriculture since World War II, and examines the role of federal policy in encouraging this evolution, as well as factors that are causing farmers to look for profitable, environmentally safe alternatives. Eleven case studies explore how alternative farming methods have been adopted--and with what economic results--on farms of various sizes from California to Pennsylvania.
1 324 kr
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News reports concerning decline of the world's forests are becoming sadly familiar. Most losses are measured in square kilometers, but a more profound loss cannot be measured. As forests disappear, so do their genetic resources. The genes they possess can no longer aid in their adaptation to a changing environment, nor can they be used to develop improved varieties or products. This book assesses the status of the world's tree genetic resources and management efforts. Strategies for meeting future needs and alternatives to harvesting natural forests are presented. The book also outlines methods and technologies for management, evaluates activities now under way, and makes specific recommendations for a global strategy for forest management.
Investing in Research
A Proposal to Strengthen the Agricultural, Food, and Environmental System
Häftad, Engelska, 1989
1 763 kr
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This book provides an analysis of funding for agricultural research in the United States and presents a proposal to strengthen this system. Its premise is that a judicious but substantial increase in research funding through competitive grants is the best way to sustain and strengthen the U.S. agricultural, food, and environmental system. The proposal calls for an increased public investment in research; a broadened scientific scope and expanded program areas of research; and four categories of competitively awarded grants, with an emphasis on multidisciplinary research.
1 324 kr
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In the United States, the critical task of preserving our plant genetic resources is the responsibility of the National Plant Germplasm System (NPGS). NPGS undergoes a thorough analysis in this book, which offers wide-ranging recommendations for equipping the agency to better meet U.S. needs--and lead international conservation efforts. The book outlines the importance and status of plant genetic conservation and evaluates NPGS's multifaceted operations. Two options for revamping NPGS within the U.S. Department of Agriculture are included.
Toward Sustainability
A Plan for Collaborative Research on Agriculture and Natural Resource Management
Häftad, Engelska, 1991
1 232 kr
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Toward Sustainability recommends a design for a new Collaborative Research Support Program (CRSP) for the U.S. Agency for International Development (AID). Currently, eight CRSPs operate under legislation that supports long-term agricultural research of benefit to developing countries and the United States. This book defines a process by which knowledge from all relevant AID-supported programs could be integrated and applied to advance profitable farming systems that improve local conditions and contribute to environmental goals. It makes recommendations on the types of competitive grants that should be made available under a new program, institutional participation, content of research proposals, and administrative procedures.
1 982 kr
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1 370 kr
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This book presents efforts to chart the comprehensive changes needed to meet the challenges of undergraduate professional education in agriculture. The United States needs to invest in the future--in human capital and the scientific knowledge base--to revitalize one of its leading industries, the agricultural, food, and environmental system. That objective can be met by educating all students about agriculture as well as by educating others specifically for careers in agriculture. Agriculture and the Undergraduate includes perspectives on rewarding excellence in teaching and formulating curricula to reflect cultural diversity, the environment, ecology, agribusiness and business, humanities and the social sciences, and the economic and global contexts of agriculture.
1 370 kr
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Rain forests are rapidly being cleared in the humid tropics to keep pace with food demands, economic needs, and population growth. Without proper management, these forests and other natural resources will be seriously depleted within the next 50 years. Sustainable Agriculture and the Environment in the Humid Tropics provides critically needed direction for developing strategies that both mitigate land degradation, deforestation, and biological resource losses and help the economic status of tropical countries through promotion of sustainable agricultural practices. The book includes * A practical discussion of 12 major land use options for boosting food production and enhancing local economies while protecting the natural resource base. * Recommendations for developing technologies needed for sustainable agriculture. * A strategy for changing policies that discourage conserving and managing natural resources and biodiversity. * Detailed reports on agriculture and deforestation in seven tropical countries.
1 382 kr
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Rangelands comprise between 40 and 50 percent of all U.S. land and serve the nation both as productive areas for wildlife, recreational use, and livestock grazing and as watersheds. The health and management of rangelands have been matters for scientific inquiry and public debate since the 1880s, when reports of widespread range degradation and livestock losses led to the first attempts to inventory and classify rangelands. Scientists are now questioning the utility of current methods of rangeland classification and inventory, as well as the data available to determine whether rangelands are being degraded. These experts, who are using the same methods and data, have come to different conclusions. This book examines the scientific basis of methods used by federal agencies to inventory, classify, and monitor rangelands; it assesses the success of these methods; and it recommends improvements. The book's findings and recommendations are of interest to the public; scientists; ranchers; and local, state, and federal policymakers.
1 278 kr
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Using the latest research in fish nutrition, this volume revises and combines the 1981 edition on coldwater fish and the 1983 edition on warmwater fish and shellfish. In addition to updating requirements for energy, protein, minerals, and vitamins, this book provides, for the first time, summary tables on nutrient requirements of a variety of fish species, including channel catfish, rainbow trout, Pacific salmon, carp, and tilapia. Tabular data on amino acid requirements of 11 species are also included. Shellfish are not included in this edition because of lack of scientific information.
412 kr
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This classic reference for poultry nutrition has been updated for the first time since 1984. The chapter on general considerations concerning individual nutrients and water has been greatly expanded and includes, for the first time, equations for predicting the energy value of individual feed ingredients from their proximate composition. This volume includes the latest information on the nutrient requirements of meat- and egg-type chickens, incorporating data on brown-egg strains, turkeys, geese, ducks, pheasants, Japanese quail, and Bobwhite quail. This publication also contains new appendix tables that document in detail the scientific information used to derive the nutrient requirements appearing in the summary tables for each species of bird.