Presentation on theme: "OMAF Nitrogen Verification Project Crop Technology Team 200 sites across Ontario (70 Hort) 3 years - 4 samples per year 2,400 soil samples!"— Presentation transcript:
OMAF Nitrogen Verification Project Crop Technology Team 200 sites across Ontario (70 Hort) 3 years - 4 samples per year 2,400 soil samples!
Nitrogen and Groundwater 23% of Ontario residents rely on groundwater 90% of rural residents 15% of rural wells above 10 ppm NO3-N nitrates are the main quality issue soils with high leaching potential are at most risk
1992 Groundwater Survey - Nitrates 1296 Rural Wells % of wells with greater than 10 ppm nitrates
Calculated Regional N Balance - OECD MacDonald, 2000
Calculated N Balance - 1996 Source: Environmental Sustainability of Canadian Agriculture 69% of Ont farmland increased at least 5kg/ha between 1981 and 1996 % Ont Farmland 26% 22% 15% 37% 21 - 40
Risk Assessment Residual N isnt necessarily the most accurate measure of risk on a farm-by farm basis Non- Farmers will use this data, unless given something better
Related Projects Cover Crops/Catch Crops Sweet Corn Nitrogen on-Farm Demonstration Trials 40 Years of Field Corn Nitrogen Database Fertigation Scheduling in Melons & S.berries –Tissue/Petiole Recs vs. Weekly Program