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Author: U.S. Office of Experiment Stations
Publisher:
ISBN:
Category : Agricultural experiment stations
Languages : en
Pages : 1084
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Book Description
Author: U.S. Office of Experiment Stations
Publisher:
ISBN:
Category : Agricultural experiment stations
Languages : en
Pages : 1084
Get Book Here
Book Description
Author: United States. Office of Experiment Stations
Publisher:
ISBN:
Category : Agricultural experiment stations
Languages : en
Pages : 1070
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Book Description
Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 2046
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Book Description
Author: F. A. Hayes
Publisher:
ISBN:
Category : Soil surveys
Languages : en
Pages : 70
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Book Description
Author:
Publisher:
ISBN:
Category : Butadiene
Languages : en
Pages : 142
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309278139
Category : Nature
Languages : en
Pages : 423
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Book Description
Across the United States, thousands of hazardous waste sites are contaminated with chemicals that prevent the underlying groundwater from meeting drinking water standards. These include Superfund sites and other facilities that handle and dispose of hazardous waste, active and inactive dry cleaners, and leaking underground storage tanks; many are at federal facilities such as military installations. While many sites have been closed over the past 30 years through cleanup programs run by the U.S. Department of Defense, the U.S. EPA, and other state and federal agencies, the remaining caseload is much more difficult to address because the nature of the contamination and subsurface conditions make it difficult to achieve drinking water standards in the affected groundwater. Alternatives for Managing the Nation's Complex Contaminated Groundwater Sites estimates that at least 126,000 sites across the U.S. still have contaminated groundwater, and their closure is expected to cost at least $110 billion to $127 billion. About 10 percent of these sites are considered "complex," meaning restoration is unlikely to be achieved in the next 50 to 100 years due to technological limitations. At sites where contaminant concentrations have plateaued at levels above cleanup goals despite active efforts, the report recommends evaluating whether the sites should transition to long-term management, where risks would be monitored and harmful exposures prevented, but at reduced costs.
Author: N. Ae
Publisher: Springer Science & Business Media
ISBN: 4431669027
Category : Technology & Engineering
Languages : en
Pages : 528
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Book Description
New research reveals that plants actively acquire nutrients; the acquisition process is not a passive one in which plants simply wait for dissolved nutrients to come closer to their roots. In fact plants play a far more active role than once was understood to be possible in nutrient acquisition and in adaptation to problem soils. This book presents an excellent overview and summary of new concepts of plant nutrient acquisition mechanisms, and sets forth their practical implications in crop production. The scope is wide ranging, from biochemical, molecular, and genetic analysis of nutrient acquisition to global nutritional problems. Especially noteworthy are the sections on the cell apoplast, phosphorus-solubilizing organisms, and direct uptake of macro-organic molecules. With contributions by leading scientists worldwide, the book provides an invaluable resource for researchers in plant and environmental sciences and in agronomy and other branches of agriculture.
Author: Justina Ray
Publisher: Island Press
ISBN: 1597266094
Category : Nature
Languages : en
Pages : 544
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Book Description
Large Carnivores and the Conservation of Biodiversity brings together more than thirty leading scientists and conservation practitioners to consider a key question in environmental conservation: Is the conservation of large carnivores in ecosystems that evolved with their presence equivalent to the conservation of biological diversity within those systems? Building their discussions from empirical, long-term data sets, contributors including James A. Estes, David S. Maehr, Tim McClanahan, Andrès J. Novaro, John Terborgh, and Rosie Woodroffe explore a variety of issues surrounding the link between predation and biodiversity: What is the evidence for or against the link? Is it stronger in marine systems? What are the implications for conservation strategies? Large Carnivores and the Conservation of Biodiversity is the first detailed, broad-scale examination of the empirical evidence regarding the role of large carnivores in biodiversity conservation in both marine and terrestrial ecosystems. It contributes to a much more precise and global understanding of when, where, and whether protecting and restoring top predators will directly contribute to the conservation of biodiversity. Everyone concerned with ecology, biodiversity, or large carnivores will find this volume a unique and thought-provoking analysis and synthesis.
Author: European Environment Agency
Publisher: Luxembourg : Office for Official Publications of the European Communities
ISBN:
Category : Antibiotics in animal nutrition
Languages : en
Pages : 220
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Book Description
The precautionary principle is widely seen as fundamental to successful policies for sustainability. This title looks back over the last century to examine the role the principle played in a range of major and avoidable public disasters.
Author:
Publisher:
ISBN:
Category : Soil surveys
Languages : en
Pages : 320
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Book Description
