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Author : Frank Rattray Lillie
Publisher : Unknown
Page : 24 pages
File Size : 49,6 Mb
Release : 1916
Category : Fertilization (Biology)
ISBN : HARVARD:32044106193881
Author : Frank Rattray Lillie
Publisher : Unknown
Page : 306 pages
File Size : 42,7 Mb
Release : 1919
Category : Conception
ISBN : UOM:39015004636059
Author : Bruce Alberts
Publisher : Unknown
Page : 0 pages
File Size : 40,5 Mb
Release : 2002
Category : Cytology
ISBN : 0815332181
Author : Institute of Medicine,Suzanne Wymelenberg
Publisher : National Academies Press
Page : 183 pages
File Size : 44,5 Mb
Release : 1990-02-01
Category : Medical
ISBN : 9780309041362
By all indicators, the reproductive health of Americans has been deteriorating since 1980. Our nation is troubled by rates of teen pregnancies and newborn deaths that are worse than almost all others in the Western world. Science and Babies is a straightforward presentation of the major reproductive issues we face that suggests answers for the public. The book discusses how the clash of opinions on sex and family planning prevents us from making a national commitment to reproductive health; why people in the United States have fewer contraceptive choices than those in many other countries; what we need to do to improve social and medical services for teens and people living in poverty; how couples should "shop" for a fertility service and make consumer-wise decisions; and what we can expect in the futureâ€"featuring interesting accounts of potential scientific advances.
Author : Vaclav Smil
Publisher : MIT Press
Page : 372 pages
File Size : 43,6 Mb
Release : 2004-02-27
Category : Science
ISBN : 0262693135
Dr. Smil is the world's authority on nitrogenous fertilizer. The industrial synthesis of ammonia from nitrogen and hydrogen has been of greater fundamental importance to the modern world than the invention of the airplane, nuclear energy, space flight, or television. The expansion of the world's population from 1.6 billion people in 1900 to today's six billion would not have been possible without the synthesis of ammonia. In Enriching the Earth, Vaclav Smil begins with a discussion of nitrogen's unique status in the biosphere, its role in crop production, and traditional means of supplying the nutrient. He then looks at various attempts to expand natural nitrogen flows through mineral and synthetic fertilizers. The core of the book is a detailed narrative of the discovery of ammonia synthesis by Fritz Haber—a discovery scientists had sought for over one hundred years—and its commercialization by Carl Bosch and the chemical company BASF. Smil also examines the emergence of the large-scale nitrogen fertilizer industry and analyzes the extent of global dependence on the Haber-Bosch process and its biospheric consequences. Finally, it looks at the role of nitrogen in civilization and, in a sad coda, describes the lives of Fritz Haber and Carl Bosch after the discovery of ammonia synthesis.
Author : Martin Abraham Abrahamsen
Publisher : Unknown
Page : 46 pages
File Size : 47,5 Mb
Release : 1954
Category : Agriculture, Cooperative
ISBN : UIUC:30112104078537
Author : U.S. Office of Experiment Stations,United States. Agricultural Research Service,United States. Office of Experiment Stations
Publisher : Unknown
Page : 1144 pages
File Size : 48,8 Mb
Release : 1921
Category : Agricultural experiment stations
ISBN : UOM:39015075062920
Author : F.B Lewu,Tatiana Volova,Sabu Thomas,Rakhimol K R
Publisher : Academic Press
Page : 266 pages
File Size : 45,8 Mb
Release : 2020-10-14
Category : Technology & Engineering
ISBN : 9780128226148
Controlled Release Fertilizers for Sustainable Agriculture provides a comprehensive examination of precision fertilizer applications using the 4-R approach—the right amount of fertilizer at the right time to the right plant at the correct stage of plant growth. This volume consolidates detailed information on each aspect of controlled release fertilizers, including up-to-date literature citations, the current market for controlled release fertilizers and patents. Presenting the tremendous advances in experimental and theoretical studies on sustainable agriculture and related areas, this book provides in-depth insight into state-of-the-art controlled release mechanisms of fertilizers, techniques, and their use in sustainable agriculture. Conventional release mechanisms have historically meant waste of fertilizers and the adverse effects of that waste on the environment. Controlled release delivery makes significant strides in enhancing fertilizer benefit to the target plant, while protecting the surrounding environment and increasing sustainability. Presents cutting-edge interdisciplinary insights specifically focused on the controlled release of fertilizers Explores the benefits and challenges of 4-R fertilizer use Includes expertise from leading researchers in the fields of agriculture, polymer science, and nanotechnology working in industry, academics, government, and private research institutions across the globe Presents the tremendous advances in experimental and theoretical studies on sustainable agriculture and related areas
Author : Karl S. Matlin,Jane Maienschein,Rachel A. Ankeny
Publisher : University of Chicago Press
Page : 366 pages
File Size : 41,9 Mb
Release : 2020-03-12
Category : Science
ISBN : 9780226673097
For almost a century and a half, biologists have gone to the seashore to study life. The oceans contain rich biodiversity, and organisms at the intersection of sea and shore provide a plentiful sampling for research into a variety of questions at the laboratory bench: How does life develop and how does it function? How are organisms that look different related, and what role does the environment play? From the Stazione Zoologica in Naples to the Marine Biological Laboratory in Woods Hole, the Amoy Station in China, or the Misaki Station in Japan, students and researchers at seaside research stations have long visited the ocean to investigate life at all stages of development and to convene discussions of biological discoveries. Exploring the history and current reasons for study by the sea, this book examines key people, institutions, research projects, organisms selected for study, and competing theories and interpretations of discoveries, and it considers different ways of understanding research, such as through research repertoires. A celebration of coastal marine research, Why Study Biology by the Sea? reveals why scientists have moved from the beach to the lab bench and back.
Author : 楊秋忠
Publisher : Airiti Press
Page : 518 pages
File Size : 47,7 Mb
Release : 2015-01-14
Category : Technology & Engineering
ISBN : 9789865663018
Agriculture builds upon the integration of crops and the environment, with which its yield depends strongly on a healthy soil foundation. With that in mind, the knowledge of the soil and fertilizer is crucial to maintaining an environment with optimal nutrients, water and oxygen for crop production. Soil is one of human's precious resources, the protection and nurturing of our soil is thus an integral part of sustainable development. Effective soil management is considered not only a technology, but also an art. In practice, to make use the full potential of the land, the management strategies need to take account of the differences and characteristics of the soil, plant and climate that are unique to each geographical location. Such an approach is increasingly more important nowadays because of the increasing loss of cultivable land and need of high quality agricultural products.
Author : United States. Congress. House. Committee on the Judiciary
Publisher : Unknown
Page : 1220 pages
File Size : 50,7 Mb
Release : 1960
Category : Antitrust law
ISBN : STANFORD:36105119502438
Author : United States. Congress. House. Committee on Small Business. Subcommittee on Regulation, Business Opportunities, and Energy
Publisher : Unknown
Page : 1308 pages
File Size : 43,5 Mb
Release : 1989
Category : Clinics
ISBN : PURD:32754078215963
Author : R.F. Follett,J.L. Hatfield
Publisher : Gulf Professional Publishing
Page : 539 pages
File Size : 53,8 Mb
Release : 2001-12-03
Category : Technology & Engineering
ISBN : 9780080537566
Nitrogen in the Environment: Sources, Problems, and Management is the first volume to provide a holistic perspective and comprehensive treatment of nitrogen from field, to ecosystem, to treatment of urban and rural drinking water supplies, while also including a historical overview, human health impacts and policy considerations. It provides a worldwide perspective on nitrogen and agriculture. Nitrogen is one of the most critical elements required in agricultural systems for the production of crops for feed, food and fiber. The ever-increasing world population requires increasing use of nitrogen in agriculture to supply human needs for dietary protein. Worldwide demand for nitrogen will increase as a direct response to increasing population. Strategies and perspectives are considered to improve nitrogen-use efficiency. Issues of nitrogen in crop and human nutrition, and transport and transformations along the continuum from farm field to ground water, watersheds, streams, rivers, and coastal marine environments are discussed. Described are aerial transport of nitrogen from livestock and agricultural systems and the potential for deposition and impacts. The current status of nitrogen in the environment in selected terrestrial and coastal environments and crop and forest ecosystems and development of emerging technologies to minimize nitrogen impacts on the environment are addressed. The nitrogen cycle provides a framework for assessing broad scale or even global strategies to improve nitrogen use efficiency. Growing human populations are the driving force that requires increased nitrogen inputs. These increasing inputs into the food-production system directly result in increased livestock and human-excretory nitrogen contribution into the environment. The scope of this book is diverse, covering a range of topics and issues from furthering our understanding of nitrogen in the environment to policy considerations at both farm and national scales.
Author : Paul D. Escott,David R. Goldfield
Publisher : Unknown
Page : 696 pages
File Size : 41,7 Mb
Release : 1990
Category : Southern States
ISBN : IND:30000001221252
Author : Tennessee Valley Authority,James Rorty
Publisher : Unknown
Page : 74 pages
File Size : 47,5 Mb
Release : 1949
Category : Fertilizers
ISBN : CORNELL:31924003349911