How does increased and reduced soil organic matter percentages influence the efficiency of controlled release fertilizers? a comparative case study near Turtleford, Saskatchewan.
Nutrient management is integral to profitable agrisystems and maximizing cropping yields, however, excess urea application results in inefficient plant uptake and losses through leaching or volatilization which threaten our environment. New technologies to mitigate nitrogen (N) loss include Environmentally Smart Nitrogen (ESN) and NutriSphere N stabilizer (NS). Adoption of these technologies is hindered by uncertainty of how soil characteristics like organic matter (OM) affect N release, limiting the mitigation of environmental consequences. Exploratory research evaluated N release rates of ESN, NS, and urea in a local sandy loam soil type with increased and reduced OM percentages near Turtleford, Saskatchewan and determined that ESN’s N release rate most effectively met canola’s N demand in both cases and mitigated losses through efficient plant uptake.