With the wet conditions and delayed harvest experienced in parts of Manitoba in fall 2016, very few farmers were able to complete their fall fertilization program. Since early seeding is important for optimizing crop yield, producers will be looking for ways to apply their N requirements efficiently without delaying the seeding operation. In addition, soil reserves of N are variable and margins between crop revenue and input costs are modest; therefore, optimizing nitrogen fertilizer use efficiency is important. To achieve these objectives for a spring fertilization program will require use of a 4R nutrient stewardship strategy: applying the right rate of the right fertilizer source, with the right placement and at the right time to minimize losses of fertilizer N to the environment and optimize the crop’s access to the fertilizer.
For more detailed information, see the on-line factsheet at http://www.gov.mb.ca/agriculture/crops/seasonal-reports/pubs/spring-n-options-17.pdf
Submitted by John Heard, Crop Nutrition Specialist, MB Ag