Scientific Evidence to Support Micronutrient Management Practices and Recommendations for Corn and Soybeans in Ontario

The project aims to develop an accessible knowledge base for micronutrient management, support the adoption of proven practices, provide the evidence to support updated recommendations and guidelines and identify priority areas for future research and innovation. The results of the project will support Ontario’s growers in making evidence-based decisions about micronutrient management that optimize yields and maintain long-term soil health. The systematic map will provide a curated, synthesized foundation of evidence that policymakers (e.g. Ontario Soil Management Committee) can use to revise and update Ontario’s micronutrient guidelines, ensuring they are current and aligned with the latest science. It will bridge crucial knowledge gaps and offer farmers, agronomists and other stakeholders a robust, research-backed framework for micronutrient management.

By clarifying critical thresholds, best practices, and diagnostic tools, the review will reduce uncertainty in micronutrient management and promote adoption of proven strategies. This will lead to optimized micronutrient use, improved crop yields, and enhanced soil health and will contribute to the sustainability and resilience of Ontario’s corn and soybean systems while identifying priority areas for future innovation and research.