Download or read book Nitrogen Processes in Arable and Forest Soils in the Nordic Countries written by and published by Nordic Council of Ministers. This book was released on 1999 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Leaching and Runoff of Nitrogen from Agricultural Areas in the Nordic Countries written by and published by Nordic Council of Ministers. This book was released on 1992 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optimizing Nitrogen Management in Food and Energy Production and Environmental Protection written by J. Galloway and published by CRC Press. This book was released on 2002-01-01 with total page 1042 pages. Available in PDF, EPUB and Kindle. Book excerpt: The production of food and energy interfere with the natural nitrogen cycle of the earth. Many of these changes are beneficial, while others are detrimental to societies and the environment. The changing nature of nitrogen in the global environment crosses scientific disciplines, geographical boundaries and political divisions and challenges the creative minds of natural and social scientists, economists, engineers, business leaders and planners. The papers in this book give readers a panoramic view of the changing nature of reactive nitrogen in the global environment, enabling them to make better choices about nitrogen management in food production and consumption, energy production and use, and environmental protection.
Download or read book Regionalisation of Erosion and Nitrate Losses from Agricultural Land in Nordic Countries written by Seppo Rekolainen and published by Nordic Council of Ministers. This book was released on 1997 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: On cover: Environment agriculture and forestry.
Download or read book Nordic Nitrogen and Agriculture written by and published by Nordic Council of Ministers. This book was released on 2017 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The Nordic countries have, during the last 20 years, introduced efficient measures to reduce nitrogen losses to the environment. Still, nitrogen losses from the agricultural sector are high. In this report we provide recommendations on strategies and policy instruments to achieve cost effective abatement of reactive nitrogen from agriculture in the Nordic countries.This report is based on a literature review. Additional input was also obtained from discussions at a workshop held in Gothenburg in January 2017. The workshop made it possible for experts from the four Nordic countries Denmark, Finland, Norway and Sweden to come together and discuss and compare policies and mitigation measures regarding nitrogen and agriculture. During the workshop we identified a number of policy challenges, policy actions and also knowledge gaps where further research is needed
Download or read book The European Nitrogen Assessment written by Mark A. Sutton and published by Cambridge University Press. This book was released on 2011-04-14 with total page 665 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting the first continental-scale assessment of reactive nitrogen in the environment, this book sets the related environmental problems in context by providing a multidisciplinary introduction to the nitrogen cycle processes. Issues of upscaling from farm plot and city to national and continental scales are addressed in detail with emphasis on opportunities for better management at local to global levels. The five key societal threats posed by reactive nitrogen are assessed, providing a framework for joined-up management of the nitrogen cycle in Europe, including the first cost-benefit analysis for different reactive nitrogen forms and future scenarios. Incorporating comprehensive maps, a handy technical synopsis and a summary for policy makers, this landmark volume is an essential reference for academic researchers across a wide range of disciplines, as well as stakeholders and policy makers. It is also a valuable tool in communicating the key environmental issues and future challenges to the wider public.
Download or read book Influence of Atmospheric Nitrogen Deposition on Nitrogen Leakage to Surface Water in Forest Ecosystems written by Stefan Löfgren and published by Nordic Council of Ministers. This book was released on 1991 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Policy brief Nitrogen budgets and the link to carbon sequestration in the Nordic forests written by Moldan, Filip and published by Nordic Council of Ministers. This book was released on 2021-12-21 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Available online: https://pub.norden.org/temanord2021-554/ We have quantified annual changes of N stocks in forests in Sweden, Finland, Norway and in Denmark in two independent ways. First, we quantified major inflows (atmospheric deposition and biological N fixation) and outflows (leaching of N to runoff and tree harvest). The N outflows were between 70% and 130% of the N inflows, not indicating major loss or build-up of organic matter in any of the four countries. Then we calculated N stock change in forests based on annual C stock changes reported to UNFCCC and known C/N ratios. All four countries report annual increase of forest C stocks. The sources of N to make the C stock increase possible have not been identified in the N budgets based on inflows and outflows. The discrepancy between forest N and C budgets raises the question of the consistency between reported N and C flows and stock changes.
Download or read book Nitrogen Fixation in Agriculture Forestry Ecology and the Environment written by Dietrich Werner and published by Springer Science & Business Media. This book was released on 2006-01-20 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainability has a major part to play in the global challenge of continued development of regions, countries, and continents all around the World and biological nitrogen fixation has a key role in this process. This volume begins with chapters specifically addressing crops of major global importance, such as soybeans, rice, and sugar cane. It continues with a second important focus, agroforestry, and describes the use and promise of both legume trees with their rhizobial symbionts and other nitrogen-fixing trees with their actinorhizal colonization. An over-arching theme of all chapters is the interaction of the plants and trees with microbes and this theme allows other aspects of soil microbiology, such as interactions with arbuscular mycorrhizal fungi and the impact of soil-stress factors on biological nitrogen fixation, to be addressed. Furthermore, a link to basic science occurs through the inclusion of chapters describing the biogeochemically important nitrogen cycle and its key relationships among nitrogen fixation, nitrification, and denitrification. The volume then provides an up-to-date view of the production of microbial inocula, especially those for legume crops.
Download or read book Icelandic Agricultural Sciences written by and published by . This book was released on 2004 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Properties and Management of Soils in the Tropics written by Pedro A. Sanchez and published by Cambridge University Press. This book was released on 2019-01-10 with total page 685 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-awaited second edition of classic textbook, brought completely up to date, for courses on tropical soils, and reference for scientists and professionals.
Download or read book Nitrogen in Agricultural Landscape written by Lech Wojciech Szajdak and published by CRC Press. This book was released on 2021-06-18 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Agriculture transforms the environment. The simplification of agroecosystems structure increases the hazards of leaching, wind and water erosion, and volatilization of chemicals from soil. Soil nitrogen is of interest as a major crop nutrient, but also as a potential environmental pollutant. Knowledge about the behavior of soil nitrogen is desirable in order to optimize plant growth and crop yield and to minimize environmental side effects. This book also gives information about the function of biogeochemical barriers in the form of shelterbelts, which efficiently decrease the concentrations of various forms of nitrogen in ground water.
Download or read book Agricultural and Food Science in Finland written by and published by . This book was released on 2000 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nordic Nitrogen and Agriculture written by Sofie Hellsten and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Leaching and Runoff of Nitrogen from Agricultural Areas in the Nordic Countries written by and published by . This book was released on 1992 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Control of Carbon Uptake and Growth in a Populus Trichocarpa Plantation in Iceland written by Bjarni D. Sigurdsson and published by . This book was released on 2001 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nitrogen Cycling in the Northern Hardwood Forest written by Lucas Emil Nave and published by . This book was released on 2007 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Nitrogen (N) is the nutrient most limiting to plant growth (NPP) in temperate forests. In N-limited temperate forests, most of the N required for NPP is recycled between soil and plant N pools by the microbial process of N-mineralization (Nmin). However, human activities have increased atmospheric N deposition (Ndep) to forests in the last 50-100 years, and this surplus N may increase NPP. But, forest responses to Ndep are not satisfactorily understood, and depend on how atmospheric N inputs are partitioned between soils and plants. From my field data collection at a mature forest site, I estimated that NPP required 51 kg N ha−1 yr−1, most of which was used for fine root and leaf production (62% and 31%, respectively). Each year, Nmin supplied 87% of Nreq, and Ndep contributed an additional 13%, 4% of which was due to canopy retention of Ndep (Ncr). Data from my mesocosm 15N-labelling experiment suggested that very little (10%) of Ncr observed in the field was actually taken up by trees, and the majority of Ndep (85%) was assimilated into soil pools. These results suggest that Ndep could not have significantly increased forest NPP at UMBS over the time scale of my studies. My greenhouse experiment corroborated this conclusion, with tree seedlings showing no significant increase in photosynthesis or growth in response to Ndep at ambient rates. However, Ndep to forest ecosystems has been occurring for decades in industrialized regions, and most of the N inputs have been incorporated into soil organic matter (SOM). Research across temperate forests has suggested that forests exposed to large N inputs over time exhibit decreased soil C/N ratios, which are associated with faster Nmin rates. Using meta-analysis, I verified this pattern in the literature, and discovered novel relationships between forest soil properties and their responses to N inputs. My results demonstrated a long-term, quantitative relationship between Ndep and Nmin, and suggest that NPP may increase in temperate forests affected by Ndep.
