Author: Sharon Vogels
Nitrogen management is one of the most challenging aspects of crop nutrition in Ontario. Weather variability, soil type, and timing all influence nitrogen efficiency. While application may still be weeks away, February is when growers decide how nitrogen will be managed across corn, wheat, and the broader rotation.
Early planning allows for flexibility and reduces risk once spring conditions unfold.
Understanding Nitrogen Loss Risk in Ontario Soils
Nitrogen loss can occur through leaching, volatilization, and denitrification—especially in wet or compacted soils. Ontario’s variable spring conditions make nitrogen timing and protection critical.
Soil texture plays a major role:
- Heavier clay soils are more prone to denitrification
- Lighter-textured soils increase leaching risk
Matching nitrogen strategy to soil conditions helps preserve nutrient availability during peak crop demand.
Crop-Specific Nitrogen Considerations
Corn
Corn typically has the highest nitrogen demand. Split applications can help:
- Reduce early-season loss
- Align nitrogen availability with rapid vegetative growth
- Improve overall nitrogen use efficiency
Winter Wheat
Winter wheat requires nitrogen early in the spring to support tillering and yield development. Timely application is essential to maximize response and maintain protein levels.
Soybeans
While we have not traditionally applied nitrogen to soybeans, there has been evidence that high yielding crops (60+ bus/ac) cannot supply sufficient N from biological fixation through the plant’s nodules. The response to added nitrogen will vary, depending on weather, soil conditions, organic matter, and total yield potential.
It is also hard to discuss nitrogen without also addressing sulphur at the same time. Adequate S is required for good nodulation & subsequent N fixation. Recent data shows a response in soybean yield to applied sulphur. This response is most consistent for early planting on coarse textured soils.
Protecting Nitrogen Investment with Stabilizers
Nitrogen stabilizers and inhibitors can be valuable tools when:
- Early nitrogen applications are planned
- Weather risk is elevated
- Soil conditions increase loss potential
These products help slow nitrogen conversion and movement, keeping nutrients available longer and reducing the risk of loss.
Sylvite Nitrogen Solutions
Sylvite offers flexible nitrogen programs using urea and UAN, combined with nitrogen stabilizers and inhibitors tailored to Ontario conditions. With custom application timing and agronomic support, growers can build nitrogen strategies that balance performance, efficiency, and stewardship.
February nitrogen planning provides confidence before spring—and ensures crops are positioned for success when growth accelerates.
