Enhancing Nitrogen Management in Canola: Addressing Field Spatial and Temporal Variability with In-Crop Variable Rate Applications of Nitrogen Fertilizer
Principal investigator: Guy P. Lafond, Agriculture and Agri-Food Canada, Indian Head, SK
Collaborator: Byron Irvine
Producers are looking for ways to apply nitrogen fertilizer more efficiently based on variability within each field. Recent advances with optical sensors allow producers to uncover spatial (plant density) and temporal (plant staging) variability in real time, and then top dress nitrogen to address this variability.
Optical sensors measure the amount of light reflected off the crop, which is used to calculate Normalized Difference Vegetative Index (NDVI). A difference in NDVI implies differences in above ground biomass or growth. Differences in plant growth also imply differences in nutrient uptake.Open the PDF to read the entire research summary from the 2013 Science Issue of Canola Digest
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