Download or read book Use of 15N to Study Nitrogen Transformations in Land Treatment written by Thomas F. Jenkins and published by . This book was released on 1979 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to compare different strategies of using 15N as a tracer to describe the fate of wastewater N in land application of wastewater. Four soil columns were packed with Windsor sandy loam soil and covered with forage grass. The columns were treated with 7.5 cm of either tapwater or wastewater according to four experimental strategies. The strategies varied the treatment given the soil prior to application of the 15N label, the schedule and amounts of the applied 15N label, and the type of water used for subsequent column leaching. Soil solution at depth and leachate were analyzed weekly for concentration and 15N content of nitrate and ammonium. Plant samples were obtained periodically throughout the experiment and, together with soil samples collected at the end of the experiment, analyzed for total nitrogen content and 15N/14N ratios. The results indicate that nitrification occurred rapidly in the column preconditioned with wastewater, and the resulting labeled nitrogen moved in a narrow band through the soil profile. In the other columns, nitrification was delayed, resulting in the formation of a lower total amount of labeled nitrate as well as a more diffuse band. A strategy consisting of a single application of the 15N label in wastewater with a high enrichment, preceded and followed by wastewater applications, permitted the monitoring of nitrification, movement of NO3( - ) in the soil and plant uptake subsequent to application of the label. The other strategies were found to be useful for obtaining specific types of information relative to the operation of land treatment systems and other soil N pathways. (Author).
Download or read book CRREL Technical Publications written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1981 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CRREL Benchnotes written by and published by . This book was released on 1980 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nitrogen Transformations in Artificial Wetlands written by Vera M. Hally and published by . This book was released on 1990 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biochar Application written by T. Komang Ralebitso-Senior and published by Elsevier. This book was released on 2016-05-07 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biochar Application: Essential Soil Microbial Ecology outlines the cutting-edge research on the interactions of complex microbial populations and their functional, structural, and compositional dynamics, as well as the microbial ecology of biochar application to soil, the use of different phyto-chemical analyses, possibilities for future research, and recommendations for climate change policy. Biochar, or charcoal produced from plant matter and applied to soil, has become increasingly recognized as having the potential to address multiple contemporary concerns, such as agricultural productivity and contaminated ecosystem amelioration, primarily by removing carbon dioxide from the atmosphere and improving soil functions. Biochar Application is the first reference to offer a complete assessment of the various impacts of biochar on soil and ecosystems, and includes chapters analyzing all aspects of biochar technology and application to soil, from ecogenomic analyses and application ratios to nutrient cycling and next generation sequencing. Written by a team of international authors with interdisciplinary knowledge of biochar, this reference will provide a platform where collaborating teams can find a common resource to establish outcomes and identify future research needs throughout the world. Includes multiple tables and figures per chapter to aid in analysis and understanding Includes a comprehensive table of the methods used within the contents, ecosystems, contaminants, future research, and application opportunities explored in the book Includes knowledge gaps and directions of future research to stimulate further discussion in the field and in climate change policy Outlines the latest research on the interactions of complex microbial populations and their functional, structural, and compositional dynamics Offers an assessment of the impacts of biochar on soil and ecosystems
Download or read book A Model Study of Nitrogen Transformations During Wastewater Infiltration Into Soil written by Hua Chi Chen and published by . This book was released on 1983 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Lysimeters for Validating Models of Wastewater Renovation by Land Application written by Iskandar Karam Iskandar and published by . This book was released on 1978 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the construction, operation and performance of large-scale (90-cm-inside diameter and 150-cm-high) lysimeters. These lysimeters can continuously monitor soil moisture flow, soil temperature and redox potential with depth, and sample soil water and soil air with depth. The rate of soil water movement to the groundwater was continuously monitored by a rain gage and a recorder. To simulatate field conditions, an automatic spray system was developed; this system is also described in this report. The total cost of one lysimeter is approximately $650 (1975 estimate). The lysimeters are being used to validate a biophysical-chemical model of wastewater renovation by application to land. Detailed blueprints of the lysimeters are kept at CRREL and are available on request. (Author).
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1980 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Nitrogen Uses and Environmental Impacts written by Rattan Lal and published by CRC Press. This book was released on 2018-03-15 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Nitrogen Transformations in Wetland Soils written by Ronald E. Hoeppel and published by . This book was released on 1974 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book USA CRREL Benchnotes written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1983 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Limitations and Usefulness of 15N Techniques in Measuring Mineralization immobilization and Plant Uptake of Soil and Fertilizer Nitrogen written by Julie Gabrielle Lauren and published by . This book was released on 1991 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progress in Nitrogen Cycling Studies written by O. van Cleemput and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the proceedings of the `8th Nitrogen Workshop' which was held at the University of Ghent, Belgium, from 5 to 8 September 1994. Although nitrogen dynamics in different ecosystems have been studied for several decades, new orientations and other emphases have recently emerged. Previously, nitrogen was considered as an essential element mostly in terms of productivity, but now, more emphasis is attached to environmental consequences. More than 100 contributions in this book tackle recent developments within the fields of nitrogen advice systems, plant response to fertilization, immobilization and mobilization, nitrification, denitrification, leaching, ammonia volatilization and biological nitrogen fixation. A large number of papers is devoted to the formation of gaseous nitrogen compounds, while mineralization-immobilization is another topic of important interest. The book also contains the reports of discussion groups on different aspects of the nitrogen cycle.
Download or read book A Systems Study of the Transport and Transformations of Soil Nitrogen written by Fred J. Endelman and published by . This book was released on 1973 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progress in Nitrogen Cycling Studies written by Oswald van Cleemput and published by Springer Science & Business Media. This book was released on 1996 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of the 8th Nitrogen Workshop which was held at the University of Ghent, Belgium, from 5 to 8 September 1994.
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1987 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Characterization and Soil Amendment Use on Coal Surface Mine Lands written by Michael R. Norland and published by . This book was released on 1991 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
