Nitrogen Efficiency In Agricultural Soils
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Nitrogen Efficiency In Agricultural Soils
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Author : David S. Jenkinson
language : en
Publisher: Pergamon
Release Date : 1988
Nitrogen Efficiency In Agricultural Soils written by David S. Jenkinson and has been published by Pergamon this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Technology & Engineering categories.
A Seminar on nitrogen efficiency in agricultural soils and the efficiency use of fertilizer nitrogen, held in Edinburgh, 16-18 September 1987, as part of the EC Programme for the Coordination of Agricultural Research.
Nitrogen Efficiency In Agricultural Soils
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Author : David S. Jenkinson
language : en
Publisher:
Release Date : 1988
Nitrogen Efficiency In Agricultural Soils written by David S. Jenkinson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Soils categories.
Nitrogen Use Efficiency In Plants
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Author : Vanitha Jain
language : en
Publisher: New India Publishing Agency
Release Date : 2011-01-01
Nitrogen Use Efficiency In Plants written by Vanitha Jain and has been published by New India Publishing Agency this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-01-01 with Crops categories.
Nitrogen fertilizers are necessary to enhance agricultural production and to sustain food security. However, their inefficient use accrues from inherent limitations of the crop plants as well as the manner in which N fertilizers are formulated, applied and managed. The main aim of the book is to assess the various aspects of the fate of fertilizer N in context of the overall N inputs to agricultural systems, with a view to enhance the efficiency of nitrogen use and reduce the negative impacts on environment. The cross cutting issues relate to improvement in nitrogen use by emerging technologies (genetic enhancement, QTL mapping), meeting N needs by understanding its interactions with other nutrients, and mitigation of nitrogen losses caused by environmental factors and management practices. Nitrogen Use Efficiency in Plants develops links between basic and applied research and practical crop production by addressing a wide range of topics relating to nitrogen use efficiency, and to plant and crop responses to applications of nitrogen via fertilizers, including nitrogen acquisition and reduction, molecular approaches, nitrate induction and signaling; and nitrogen use under abiotic stresses. Nitrogen Use Efficiency in Plants is an invaluable classroom aid for academics working in plant physiology, biochemistry, biotechnology, molecular breeding and agronomy, and an essential professional resource for researchers working in plant and crop systems as it provides a comprehensive, interdisciplinary description of problems related to the efficient use of nitrogen in agriculture.
Nitrogen In Agriculture
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Author : A. E. Johnston
language : en
Publisher:
Release Date : 2009
Nitrogen In Agriculture written by A. E. Johnston and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Nitrogen fertilizers categories.
The increased use of nitrogen (N) fertilizers in agriculture in the last five decades is justified by the increased yield potential of the crops grown and the judicious use of agrochemicals to control weeds, pests and diseases to protect that potential. Nitrogen use-efficiency can be assessed in a number of ways, discussed here with examples, but is usually determined as percent recovery of added N in the harvested product when calculated by the difference method. Assessed in this way, N-use efficiency is frequently only about 50%. But N-use efficiency of applied N should include that taken up by roots to produce the above-ground plant, where N plays a vital role in photosynthesis, the fixation of carbon dioxide to produce sugars, and the root system, which takes up nutrients and water. The fate of this N after harvest is important, but the total amount in the crop should be included in any estimate of percent recovery of applied N. Within the plant-soil system, the soil microbial population competes with the plant for fertilizer N applied to increase plant growth. Hence any fertilizer N remaining in the soil should also be included in an estimate of the fate of applied N. The use of 15N-labelled fertilizer allows the fate of the applied N to be determined. At harvest up to 70%, and sometimes more than this, of the applied N can be accounted for in the above-ground crop and in the soil to 100 cm. The fate of the N which is not accounted for should be a major research topic.
Nitrogen Use And Behavior In Crop Production
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Author : L. Fred Welch
language : en
Publisher:
Release Date : 1979
Nitrogen Use And Behavior In Crop Production written by L. Fred Welch and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Crops and nitrogen categories.
Most plants absorbmore nitrogen than any other nutrient. Because the amount needed is so large and easily be lost from many soils, nitrogen is usually the most limiting nutrient for plant growth. Although about 79 percent of the atmosphere is nitrogen, only nitrogen-fixingplants such as legumeswith their associated bacteria are able to use this abundant source. The nonleguminous grain crops must receive supplemental nitrogen to produce satisfactory yields. Until the last few decades the supply of available nitrogen in the soil was increased primarily by legumes and manure. These sources should be used when economically feasible, but many important grain-producing areas of the world must now rely on commercial fertilizer nitrogen. For economic reasons researchers and growers have been interested for many years in improving yields from each unit of nitrogen. Recently, however, the efficient use of nitrogen has become an environmental issue as well, because high nitrate concentrations in water may be harmful to humans, especiali infants, and to livestock. If plants absorb more of the addedfertilizer nitrogen, then less is likely to leach from fields into drinking water. Improving nitrogen efficiency has also become crucial in order to conserve dwinling supplies of natural gas, which is used in large quantities to manufacture nitrogenfertilizers.
Australian Soil Fertility Manual
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Author : FIFA,
language : en
Publisher: CSIRO PUBLISHING
Release Date : 2006-09-26
Australian Soil Fertility Manual written by FIFA, and has been published by CSIRO PUBLISHING this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-09-26 with Technology & Engineering categories.
The Australian Soil Fertility Manual is a trusted guide to the safe use and handling of fertilizers. It describes the types of agricultural soils, how they are classified and the interaction of soil, water and nutrients. It also provides an insight into how plants utilise nutrients and the role that individual nutrients play in the process of plant growth. This edition has been revised to reflect an increased emphasis on the environmental fate of nutrients and appropriate management strategies. It also has additional information on soil physical, chemical, and biological properties and discussions on the use of lime, dolomite and gypsum. New content covers liming effectiveness, nitrogen water use efficiency, regulations for handling and using fertilizers, storage and transport of security sensitive ammonium nitrate, budgeting for profitable nitrogen use and best management practice for nitrogen and phosphorus fertilizers. The chapters on potassium; calcium, magnesium and sulfur; plant nutrients and the environment; and heavy metal in fertilizers and agriculture have all been extensively revised and rewritten. This important work will be an essential text for fertilizer dealers, extension workers, consultants, teachers, farmers, horticulturists, graziers and others concerned with the profitable and environmentally safe use of plant nutrients.
Can In Situ Soil Nitrate Measurements Improve Nitrpogen Use Efficiency In Agriculture Systems
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Author :
language : en
Publisher:
Release Date : 2018
Can In Situ Soil Nitrate Measurements Improve Nitrpogen Use Efficiency In Agriculture Systems written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Nitrogen In Agricultural Soils
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Author : F. J. Stevenson
language : en
Publisher:
Release Date : 1982
Nitrogen In Agricultural Soils written by F. J. Stevenson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Technology & Engineering categories.
Origem and distribution of nitrogen in soil. Inorganic forms of nitrogen in soil. Organic forms of soil nitrogen. Retention and fixation of ammonium and ammonim in soils. Biochemistry ammonification. Mineralization and Immobilization of soil nitrogem. Nitrogen trasport processes in soil. Nitrogen transformations in submerged soil. Advances in methodology for research on nitrogen transformations. Soil nitrogen budgets. Crop nitrogen requirements, utilizations, and fertilization. Nitrogen management for maximum efficiency and minimum pollution. Assesment of soil nitrogen availability. The effect of pesticides on nitrogen transformation in soils. Modeling of the soil nitrogen cycle. Economic implications of controls on nitrogen fertilizer use. Recycling of nitrogen through land application of agricultural, food processing, and municipal wastes. Energetics of nitrogen transformations. Nitrogem transfers and mass balances.
Soil Nitrogen Uses And Environmental Impacts
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Author : Rattan Lal
language : en
Publisher: CRC Press
Release Date : 2018-03-15
Soil Nitrogen Uses And Environmental Impacts written by Rattan Lal and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-03-15 with Nature categories.
Nitrogen (N) is potentially one of the most complex elements on the Earth. It is necessary for all biological activity, but creates negative impacts on water and air quality. There is a balancing act between deficiency and surplus and the forms of N available further complicate our understanding of the dynamics. Biological fixation provides some plants with N supply while others are totally dependent upon N being available in the soil profile for the roots to extract. Nevertheless, the demand for N will increase because the human population with its increasing growth requires more protein and thus more N. Understanding the global N cycle is imperative to meeting current and future nitrogen demands while decreasing environmental impacts. This book discusses availability, production, and recycling of N in air, water, plants, and soils. It features information on N impacts to soil and water quality, management of N in agroecosystems, and techniques to maximize the use efficiency while minimizing the risks of leakage of reactive N into the environment. This volume in the Advances in Soil Science series is specifically devoted to availability, production, and recycling of N with impact on climate change and water quality, and management of N in agroecosystems in the context of maximizing the use efficiency and minimizing the risks of leakage of reactive N (NO-3, N¬2O) into the environment.
Nitrogen In Agricultural Systems
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Author : James Stuart Schepers
language : en
Publisher: ASA-CSSA-SSSA
Release Date : 2008
Nitrogen In Agricultural Systems written by James Stuart Schepers and has been published by ASA-CSSA-SSSA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Technology & Engineering categories.
Review of the principles and management implications related to nitrogen in the soil-plant-water system.