Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 47 for “"N2O emissions"”.
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Impacts of enhanced efficiency nitrogen fertilizers on yield-scaled N2O emissions in Illinois maize
Nitrous oxide (N2O) is a potent greenhouse gas (GHG) with about 300 times the global warming potential of CO2 and significant levels of this GHG come from agriculture. A two-year field experiment was conducted to assess the ability of enhanced efficiency nitrogen fertilizers (EENFs) to minimize …
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Meta-analysis of how management practices and environmental factors affect biomass production and N2O emissions in miscanthus ×giganteus systems
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Nitrous oxide from denitrification: Influence of field management, environmental conditions, and nutrient availability
… scale, agriculture contributes significantly to emissions of nitrous oxide (N2O), a potent greenhouse gas and important ozone-depleting substance. To alleviate this environmental issue, there is a need to explore managements and conditions that minimize N2O emissions from agricultural systems. My …
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Nitrous oxide emissions under different corn field managements in the United States
Nitrous oxide (N2O) is a potent greenhouse gas that also contributes to stratospheric ozone depletion. Intensive nitrogen fertilizer use has increased agricultural N2O emissions and motivated research efforts to identify field management techniques that best mitigate N2O emissions and reduce these …
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Historical and contemporary drivers of greenhouse gas emissions from upland soils
… change by altering soil greenhouse gas (GHG) emissions. Ponding of soils can temporarily decrease soil O2 concentrations, creating conditions conducive for anaerobic biogeochemical reactions that produce and consume nitrous oxide (N2O) and carbon dioxide (CO2). In addition to the contemporary …
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Evaluating soil productivity and climate change benefits of woody biochar soil amendments for the US Interior West
… climate impacts through reduced nitrous oxide (N2O) emissions from fertilizer use and carbon (C) sequestration. This dissertation evaluates such claims for woody biochar applications within the US Interior West; to enhance crop production and reduce N2O emissions in deficit irrigation …
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Nutrient cycles across topography in drainage-impaired Corn Belt soils
Greenhouse gas emissions and nutrient leaching from Corn Belt soils pose a threat to both local and global human and environmental health. Topographic depressions in the US Corn Belt have documented impacts on hydrology, crop production, soil characteristics, and soil microbial communities. These …
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Microbial Regulation of Soil Greenhouse Gas Emissions in a Non-Bloat Legume Grazing System
… pastures are a source of greenhouse gas (GHG) emissions, including enteric methane from ruminating cattle, carbon dioxide (CO2), and nitrous oxide (N2O) from microbial respiration of soil carbon (C) and nitrogen (N). Producers may introduce non-bloat legumes to cattle pastures to improve soil N …
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Comparisons of N2O and CH4 fluxes as affected by land use systems and climate in small catchments in Korea
… to climatic and other anthropogenic changes. Emissions of greenhouse gases like Nitrous oxide (N2O) and Methane (CH4) are of global concern, too, because they are involved in global warming and therewith: climate change. Major sources of N2O are agriculturally managed soils, and very important …
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Modeling of N2O emission from unmanaged terrestrial ecosystem soils
Nitrous oxide (N2O) is not only an important greenhouse gas, but also impacts stratospheric ozone. Soils under natural vegetation and agriculture are the major sources of N2O through nitrification and denitrification processes. Current estimates of N2O emissions on regional to global scales are …
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Direct and indirect nitrous oxide emissions from controlled release and conventional fertilizers applied to potatoes in coarse textures soil.
… quality concern, and may potentially also reduce emissions of N2O, a greenhouse gas with nearly 300 times the warming potential of carbon dioxide. However, comparisons of multiple PCUs are uncommon. Studies were conducted over three years to compare N loss (as NO3 - and N2O), yield response, and N …
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Modelling spatial variation and environmental impacts of land use change in the exploitation of land-based renewable bioenergy crops
… to assess variation in yield, nitrous oxide (N2O) emissions, evapotranspiration (ET) and change in soil organic carbon (SOC) according to soil properties, hydrologic regime and previous land use. Development of the DayCent model as part of this research gave improved simulation of the impacts …
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Legacy Effects of Long-term Manure Applications on Soil-derived Nitrous Oxide Emissions
… urea applications would affect nitrous oxide (N2O) emissions. My hypotheses were that long-term manure applications would produce a legacy (or priming) effect that would result in enhanced N2O emissions following the changeover to a more readily available nitrogen source and that this effect …
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ONLINE MONITORING OF NITROGEN GREENHOUSE GASES FROM WATER RECLAMATION PLANTS
… (BNR) processes can significantly increase urban N2O emissions, where N2O is produced from both nitrification and denitrification stages as an intermediate. As a response to the governmental concern of climate change, a study on online monitoring of N2O emissions from Singapore WRPs has been …
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Spring-Thaw Nitrous Oxide Emissions From Reed Canarygrass On Wet Marginal Soil In New York State
… climates, a significant fraction of annual emissions of nitrous oxide (N2O) from agricultural land occurs during soil thaw. The objective of this study is to determine the impact of conversion of long-term fallow grassland to perennial grass bioenergy crops on N2O emissions during …
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Evaluating greenhouse gas emissions from Illinois agriculture systems
… (N-NO3) leaching, and release of nitrous oxide (N2O) by denitrification, thus contributing to both water and air pollution. Agricultural soil management accounts for much of the total N2O production in the US. Two of the most important agricultural practices aimed at improving soil properties and …
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Balancing water quality, nitrogen management, and corn production goals in Illinois
… (NO3-N) leaching and nitrous oxide (N2O) emissions, negatively impacting water and air quality, respectively. Given these competing demands, there is a pressing need to develop new strategies for maintaining grain yields and economic returns while decreasing the risk of environmental …
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Greenhouse gas emissions from production of Miscanthus x giganteus on a Mollisol
… such as carbon dioxide (CO2) and nitrous oxide (N2O) during their production. Most crops require nitrogen (N) fertilization to maximize productivity, but the amount of N fertilizer Miscanthus x giganteus might need is currently not known. Because M. x giganteus is highly efficient in its N use, …
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Location, location: Factors influencing greenhouse gas fluxes from the Mississippi Delta agricultural region
<p>Methane (CH4), nitrous oxide (N2O), and carbon dioxide (CO2) fluxes from agricultural landscapes may contribute significantly to regional greenhouse gas budgets due to stimulation of soil microbial activity through fertilizer application. Few studies have made measurements of CH4, N2O, and CO2 …
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Denitrification and greenhouse gas emissions from cultivated and wetland alluvial soils
… cultivated lands and restored forested wetlands. N2O, CH4 and CO2 emissions from restored and natural forested wetlands were measured to determine if restoration for NO3 removal will increase greenhouse gas emissions, thereby contributing to global warming and compromising the water quality …
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