Long-term Optimum Nitrogen Rate for Corn Yield and Soil Organic Matter
IPNI-2008-CAN-ON29
This project began with a uniformity trial conducted in 2008 at Elora, Ontario. Long-term and short-term N rate treatments commence in 2009. Objectives Assess short-term and long-term effects of N in maize production on productivity, environmental impact, profitability, and cropping system sustainability. Read more
Interpretive Summary
Decisions on optimum nitrogen (N) rates are often made on the basis of single-year responses. Data are limited on the long-term impact on productivity and soil organic matter using fertilizer application rates higher or lower than these short-term optima. This controlled experiment was designed as a base for testing the application of dynamic soil-crop-atmosphere models as predictors of N rates for corn that optimize sustainability.
Decisions on optimum nitrogen (N) rates are often made on the basis of single-year responses. Data are limited on the long-term impact on productivity and soil organic matter using fertilizer application rates higher or lower than these short-term optima. This controlled experiment was designed as a base for testing the application of dynamic soil-crop-atmosphere models as predictors of N rates for corn that optimize sustainability.
Updates & Reports
2015 | 2015 Annual Report |
2013 | 2013 Annual Report |
2012 | 2012 Annual Report |
2008 | Project Description |
Publications
Project Leader
Bill Deen, University of Guelph
Project Cooperators
John Lauzon, Department of Land Resource Science
Greg Stewart, Ontario Ministry of Agriculture, Food and Rural Affairs
IPNI Staff
Location
Americas \ Northern America \ CAN \ Ontario