Key Takeaways
- NC State University researchers completed a three-year study on nitrogen-related emissions from corn fields in North Carolina.
- The study evaluated dual urease and nitrification inhibitors across 18 farms with different soil types.
- Results showed consistent reductions in ammonia emissions, while nitrous oxide outcomes varied by soil texture.
- Yield impacts were generally small, even with reduced nitrogen application rates.
- Findings may inform future incentive programs and carbon crediting discussions.
NC State University Conducts Multi-Year Study on Fertilizer Emissions
Researchers at NC State University are gaining new insights into how enhanced efficiency fertilizers affect nitrous oxide and ammonia emissions in corn production. Since 2023, the study has examined 18 farms across North Carolina, from Greensboro to the coastal plain, focusing on environmental outcomes and potential economic implications for growers.
The research is led by Alex Woodley, associate professor in the Department of Crop and Soil Sciences and faculty affiliate of the N.C. Plant Sciences Initiative. The project, known as the Beyond Yield study, is funded by the U.S. Department of Agriculture’s Natural Resources Conservation Service and involves collaboration with multiple NC State faculty members.
Conventional nitrogen fertilizers are widely used to boost crop yields, but only an estimated 40–60% of applied nitrogen is absorbed by plants. Unused nitrogen can be converted into nitrous oxide, a potent greenhouse gas, or ammonia, which can negatively affect air and water quality.
