A5028111953- Soil Carbon and Nitrogen Dynamics
- Soil and Unsaturated Flow
- Soil Mechanics and Vehicle Dynamics
- Soil Management and Crop Yield
- Soil and Water Nutrient Dynamics
- Crop Yield and Soil Fertility
- Soil erosion and sediment transport
- Nematode management and characterization studies
- Contemporary Sociological Theory and Practice
- Agricultural Engineering and Mechanization
- Polymer-Based Agricultural Enhancements
- Cardiac electrophysiology and arrhythmias
- ECG Monitoring and Analysis
- Microbial Community Ecology and Physiology
- Peatlands and Wetlands Ecology
- Legume Nitrogen Fixing Symbiosis
- Plant nutrient uptake and metabolism
- Potato Plant Research
- Plant responses to water stress
- Soil Geostatistics and Mapping
- Irrigation Practices and Water Management
- Plant Growth Enhancement Techniques
- Rice Cultivation and Yield Improvement
- Bioenergy crop production and management
- Forest Biomass Utilization and Management
Agriculture and Agri-Food Canada
2015-2024
Ottawa Research and Development Centre
2015-2024
Government of Canada
1998-2023
International Development Research Centre
2021-2022
Ningxia Academy of Agriculture and Forestry Sciences
2022
McMaster University
2021
University of California, Davis
2017
Cereal Research (Hungary)
1998-2012
National Institutes of Health
2005-2006
University of Illinois Chicago
2004-2005
Innovative management practices are required to increase the efficiency of N fertilizer usage and reduce nitrous oxide (N 2 O) carbon dioxide (CO ) emissions from agricultural soils. The objectives this study were evaluate feasibility using conservation tillage placement depth O CO associated with corn ( Zea mays L.) production on clay loam soils in Eastern Canada. A 3‐yr field was established a wheat Triticum aestivum L.)‐corn–soybean [Glycine max (L.) Merr.] rotation each phase present...
Abstract Nitrogen fertilization is considered as an important source of atmospheric N 2 O emission. A seven site‐year on‐farm field experiment was conducted at Ottawa and Guelph, ON Saint‐Valentin, QC, Canada to characterize the affect amount timing fertilizer on emission in corn ( Zea mays L.) production. Using static chamber method, gas samples were collected for 28‐days after preplant sidedress site‐year, resulting 14 monitoring periods. For both methods fertilization, peak flux...
To quantify the errors associated with manual measurement of QT intervals and to determine source errors.A randomised study by four cardiologists electrocardiograms plotted on paper in presentations different noise levels, speeds, amplifier gains, without a second QRST complex indicate RR interval.Four electrocardiograph leads (I, aVR, V1, V5) recorded eight healthy people relaxing semirecumbent position.Manual interval 512 (eight subjects x two repeats) each cardiologists.QT measured were...
Ammonia (NH 3 ) volatilization is one of the main pathways through which applied N enters environment undesirably. A seven site‐year on‐farm field experiment was performed for yr at Ottawa, ON, and 2 Guelph, Saint‐Valentin, QC, Canada. Our objectives were to (i) quantify flux amount NH as affected by rate time fertilizer; (ii) assess impact rainfall soil temperatures on volatilization; (iii) determine threshold level fertilizer large losses occur. Using static chamber method, monitored after...
Nitrate lost from agricultural soils is an economic cost to producers, environmental concern when it enters rivers and lakes, a health risk wells aquifers used for drinking water. Planting winter wheat cover crop (CC) and/or use of controlled tile drainage–subirrigation (CDS) may reduce losses nitrate (NO3−) relative no (NCC) traditional unrestricted drainage (UTD). A 6-yr (1999–2005) corn–soybean study was conducted determine the effectiveness CC+CDS, CC+UTD, NCC+CDS, NCC+UTD treatments...
A 3-yr study was conducted to determine the effectiveness of N fertilizer application times (at planting vs. sidedress) and source (regular urea coated urea) on N2O emissions corn (Zea mays L.) grain yields from soil under conventional tillage (CT), zone (ZT), or no-tillage (NT) in southwestern Ontario. On average, 4.19 kg ha−1 yr−1 were lost CT treatments as these losses reduced by 16.6% with NT (3.50 yr−1) 43.8% ZT (2.35 ha−1). There some significant effects time emissions; however,...
Tree roots are highly heterogeneous in form and function. Previous studies revealed that fine root respiration was related to morphology, tissue nitrogen (N) concentration temperature, varied with both soil depth season. The underlying mechanisms governing the relationship between chemistry anatomy along branch order have not been addressed. Here, we examined these relationships of first- fifth-order for near surface (0–10 cm) 22-year-old larch (Larix gmelinii L.) ash (Fraxinus mandshurica...
Crop residue return is imperative to maintain soil health and productivity but some farmers resist adopting conservation tillage systems with fearing reduced temperature following planting crop yield. Soil temperatures were measured at 10 cm depth for one month from 2004 2007 in a field experiment Northeast China. Tillage treatments included mouldboard plough (MP), no till (NT), ridge (RT) maize (Zea mays L.) soybean (Glycine max Merr.) crops. had significant effects on of 15 weekly periods....
OBJECTIVE--To undertake a quantitative assessment of different automatic QT measurement techniques and investigate the influence electrocardiogram filtering algorithm parameters. DESIGN--Four methods for identifying end T wave were compared: (1) threshold crossing (TH); (2) differential (DTH); (3) intercept an isoelectric level maximum slope (SI); (4) line passing through peak point (PSI). Automatic measurements made by all following and, when appropriate, with four levels three levels....
It is well established that nitrous oxide (N 2 O) and carbon dioxide (CO ) emissions from agricultural land are influenced by the type of crop grown, form amount nitrogen (N) applied, soil climatic conditions under which grown. Crop rotation adds another dimension often overlooked, however, as residue being decomposed supplying soluble to biota usually a different than currently growing. Hence, objective this study was compare influence both grown residues preceding on N O CO soil. In...
Abstract Water scarcity is the main limiting factor in agricultural crop production arid and semi-arid areas northern China. Humic acid could improve plant resistance to mitigate abiotic drought damages, which a potential strategy these regions. An experiment investigate effect of water soluble humic on growth, photosynthesis characteristics fresh tuber yield potato under different deficits was carried out greenhouse conditions 2014 2015. Treatments included foliar application (FW), diluted...
OBJECTIVE: To assess differences in the accuracy of automatic QT measurement three subject groups, and to determine influence T wave amplitude on these measurements. SUBJECTS: Standard simultaneous 12 lead electrocardiograms were acquired from 25 patients post myocardial infarction, with arrhythmias, controls. DESIGN: Because there is not yet a standard method for analysis, four different techniques used. Manual measurements used as reference. was measured two complexes by each technique...
An instrumented research tractor was used to determine the energy inputs for eight primary tillage implements applied a Brookston clay loam soil in southwestern Ontario, Canada. The measurements included draft, fuel consumption (L ha-1), and specific GJ-1), which is an indicator of tractor-implement match. Implements moldboard plow, chisel disk ripper, combination sweep, harrow, fluted coulter, deep zone till, shallow till. study conducted over four years (2002-2005) using randomized...