A5057707262- Anaerobic Digestion and Biogas Production
- Agriculture Sustainability and Environmental Impact
- Odor and Emission Control Technologies
- Soil and Water Nutrient Dynamics
- Atmospheric and Environmental Gas Dynamics
- Wastewater Treatment and Nitrogen Removal
- Soil Carbon and Nitrogen Dynamics
- Soil and Unsaturated Flow
- Environmental Impact and Sustainability
- Constructed Wetlands for Wastewater Treatment
- Effects of Environmental Stressors on Livestock
- Landfill Environmental Impact Studies
- Hydrology and Watershed Management Studies
- Plant Water Relations and Carbon Dynamics
- Peatlands and Wetlands Ecology
- Climate change and permafrost
- Plant responses to elevated CO2
- Climate change impacts on agriculture
- Carbon Dioxide Capture Technologies
- Phosphorus and nutrient management
- Animal Behavior and Welfare Studies
- Wastewater Treatment and Reuse
- Municipal Solid Waste Management
- Atmospheric chemistry and aerosols
- Recycling and Waste Management Techniques
Agriculture and Agri-Food Canada
2016-2025
Ottawa Research and Development Centre
2016-2024
Government of Canada
2022
University of Guelph
2011
Dalhousie University
2008-2010
Agricultural practices such as including perennial alfalfa ( L.), winter wheat or red clover L.) in corn rotations can provide higher crop yields and increase soil organic C (SOC) over time. How well process-based biogeochemical models DeNitrification-DeComposition (DNDC) capture the beneficial effects of diversified cropping systems is unclear. To calibrate validate DNDC for simulation observed trends yield SOC, we used long-term trials: continuous (CC) corn-oats L.)-alfalfa-alfalfa (COAA)...
Nitrous oxide (N2O) emissions from manure-amended soils are estimated to be 1525 kt CO2e in Canada. The accuracy of this estimate is dependent on emission measurements. However, obtaining accurate measurements challenging due the variable distribution livestock types, climates, soils, and management across This study compares research studies temporal spatial N2O land applied manure with estimates National Inventory Reports evaluate how aligns key factors driving emissions. Overall, 122...
There is a need for modeling tools capable of estimating CO2 emissions from land application biosolids and manure. The Denitrification Decomposition model (DNDC) was improved this capacity by adding separate manure C pool to disaggregate decomposition the soil organic matter pools. effect temperature on also improved. Data collected two climatically distinct sites in Montreal (Quebec) Truro (Nova Scotia) with corn were used test DNDC simulating yield, moisture, fluxes amended (mesophilic...
The Canadian dairy sector is a major industry with about 1 million cows. This emits 20% of the total greenhouse gas (GHG) emissions from main livestock sectors (beef, dairy, swine, and poultry). In 2006, herd produced 7.7 Mt raw milk, resulting in 4.4 products (notably 64% fluid milk 12% cheese). An integrated cradle-to-gate model (field to processing plant) has been developed estimate carbon footprint (CF) 11 products. on-farm part Unified Livestock Industry Crop Emissions Estimation System...
Perennial crops can deliver a wide range of ecosystem services compared to annual crops. Some these benefits are achieved by lengthening the growing season, which increases period crop water and nutrient uptake, pointing potential role for perennial systems mitigate soil nitrous oxide (N2 O) emissions. Employing micrometeorological method, we tested this hypothesis in 3-year field experiment with grass-legume mixture an corn monoculture. Given that N2 O emissions strongly dependent on method...
The Denitrification Decomposition model (DNDC) has known limitations for simulating soil hydrology which can strongly influence biogeochemical processes. For this study, DNDC's hydrological framework was enhanced by including a new sub-model mechanistic tile drainage, improved water flux, root growth dynamics, and deeper heterogeneous profile. Comparisons were then conducted against the Root Zone Water Quality Model (RZWQM2), using measurements of storage, runoff, drainage in eastern Canada...
This study evaluated the effect of straw covers on emissions from liquid manure during storage and agitation. Emissions carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), ammonia (NH3) were measured six tanks (6.6 m2 each) containing batch-loaded dairy manure. was conducted between June October 2007 in Nova Scotia, Canada. Straw added to four at two thicknesses (15 30 cm), while remained uncovered. Gas concentrations using tunable diode lasers, an infrared gas analyzer, acid traps....
Agricultural wastewater treatment is important for protecting water quality in rural ecosystems, and constructed wetlands are an effective option. During treatment, however, some C N converted to CH 4 , 2 O, respectively, which potent greenhouse gases (GHGs). The objective of this study was assess CO emissions from surface flow (SF) subsurface (SSF) wetlands. Six (three SF three SSF; 6.6 m each) were loaded with dairy Truro, Nova Scotia, Canada. From August 2005 through September 2006, GHG...
Methane emissions from manure management represent an important mitigation opportunity, yet emission quantification methods remain crude and do not contain adequate detail to capture changes in agricultural practices that may influence emissions. Using the Canadian inventory methodology as example, this letter explores three key aspects for improving quantification: (i) obtaining measurements improve validate model estimates, (ii) more useful activity data, (iii) developing a methane uses...
Liquid dairy manure treated with sulfuric acid was stored in duplicate pilot-scale storage tanks for 120 days continuous monitoring of CH4 emissions and concurrent examination changes the structure bacterial methanogenic communities. Methane were monitored at site using laser-based Trace Gas Analyzer whereas quantitative real-time polymerase chain reaction massively parallel sequencing employed to study communities 16S rRNA methyl-coenzyme M Reductase A (mcrA) genes/transcripts,...