[PDF] Effect Of Nitrogen Fertilization Rate In The Seedbed On Growth In The Field eBook

Author : Arvin Mosier
Publisher : Island Press
Page : 320 pages
File Size : 33,26 MB
Release : 2013-04-10
Category : Science
ISBN : 1597267430

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Nitrogen is an essential element for plant growth and development and a key agricultural input-but in excess it can lead to a host of problems for human and ecological health. Across the globe, distribution of fertilizer nitrogen is very uneven, with some areas subject to nitrogen pollution and others suffering from reduced soil fertility, diminished crop production, and other consequences of inadequate supply. Agriculture and the Nitrogen Cycle provides a global assessment of the role of nitrogen fertilizer in the nitrogen cycle. The focus of the book is regional, emphasizing the need to maintain food and fiber production while minimizing environmental impacts where fertilizer is abundant, and the need to enhance fertilizer utilization in systems where nitrogen is limited. The book is derived from a workshop held by the Scientific Committee on Problems of the Environment (SCOPE) in Kampala, Uganda, that brought together the world's leading scientists to examine and discuss the nitrogen cycle and related problems. It contains an overview chapter that summarizes the group's findings, four chapters on cross-cutting issues, and thirteen background chapters. The book offers a unique synthesis and provides an up-to-date, broad perspective on the issues of nitrogen fertilizer in food production and the interaction of nitrogen and the environment.

Author :
Publisher :
Page : 172 pages
File Size : 13,17 MB
Release : 1999
Category : Forests and forestry
ISBN :

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Some no. include reports compiled from information furnished by State Foresters (and others).

Author : R.F. Follett
Publisher : Gulf Professional Publishing
Page : 539 pages
File Size : 12,13 MB
Release : 2001-12-03
Category : Technology & Engineering
ISBN : 0080537561

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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 :
Publisher :
Page : 260 pages
File Size : 37,25 MB
Release : 1997
Category : Tree planting
ISBN :

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Some no. include reports compiled from information furnished by State Foresters (and others).

Author : Takuji Ohyama
Publisher : BoD – Books on Demand
Page : 218 pages
File Size : 14,37 MB
Release : 2021-09-29
Category : Technology & Engineering
ISBN : 1839684887

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Nitrogen is the most important nutrient in agricultural practice because the availability of nitrogen from the soil is generally not enough to support crop yields. To maintain soil fertility, the application of organic matters and crop rotation have been practiced. Farmers can use convenient chemical nitrogen fertilizers to obtain high crop yields. However, the inappropriate use of nitrogen fertilizers causes environmental problems such as nitrate leaching, contamination in groundwater, and the emission of N2O gas. This book is divided into the following four sections: “Ecology and Environmental Aspects of Nitrogen in Agriculture”, “Nitrogen Fertilizers and Nitrogen Management in Agriculture”, “N Utilization and Metabolism in Crops”, “Plant-Microbe Interactions”.

Author : Michael L. McGahuey
Publisher :
Page : 132 pages
File Size : 10,49 MB
Release : 1985
Category : Nitrogen fertilizers
ISBN :

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Meadowfoam has been identified as a potential oilseed crop for production on poorly drained soils in areas with cool, moist winters. The effects of N fertilizer on meadowfoam (Limnanthes alba Benth.) have been studied in Oregon and Maryland, but the results have not been consistent with respect to the effects on oil yield: yields were reduced in most cases but significantly increased in another. Excessive lodging and incidence of fungal infection were associated with N fertilization in some studies. This study evaluated the effects of twelve combinations of N rate and timing on meadowfoam oil yields and on plant growth and development. Meadowfoam selection 703-A received 50, 100, and 200 kg N ha -1 applied in fall, winter, spring, and fall/spring application schedules (regimes). Each N treatment and the control were replicated four times in randomized complete blocks on the Hyslop Research Station of Oregon State University in Corvallis, Oregon. All N treatment means for seed and oil yield were greater than the control mean. Winter applications of N fertilizer increased the efficiency of fertilizer use, increased floral density, produced relatively early dry weight gains and flowering, and increased seed-oil content. Fall-applied fertilizer N responses were reduced by leaching losses, but it appeared that some quantity of N fertilizer should be applied in the fall and another application made in late winter (before March) for optimal seed-oil yields. Fall applications of slow-release forms of N should also be studied.