Research on micronutrient response in corn in Ontario has received a modest effort, despite that micronutrients are expected to suffer from the same issues as P and K; decreases in soil quantities with increasing yields over time, and in the case of sulphur, decreasing deposition. This project is building on previous starter fertilizer research by evaluating corn yield response and economic returns to the application of sulphur and zinc through pre-manufactured micronutrient starter blends as well as traditional starter fertilizer blends. It is also examining the importance of including potassium in sulphur and zinc fertilizer blends.