We are seeking participants for two on-farm research trials. Learn more and apply by March 31.
Resources: Determining Economical Nitrogen Rates
Resources for Determining Economical Nitrogen Rate
PFI Research on Nitrogen Rates to Corn
- “Can We Reduce N Rates and Improve ROI?” (2024)
- “Can We Reduce N Rates and Improve ROI?” (2023)
- “Reduced N Rate to Corn After Repeated Use of Cover Crops” (2022)
- “Reduced N Rate to Corn After Repeated Use of Cover Crops” (2021)
Nitrogen Basics
- UMN: Understanding nitrogen in soils
- UMN Crop News: Nitrogen pools- Our experts talk timing, testing and uptake
- ISU Resources on Nitrogen
Calculator
- Corn Nitrogen Rate Calculator (a collaboration from several Upper Midwest Universities)
- UNL Corn Nitrogen Calculator
Estimating Nutrient Content of Manure
- UMN: Average manure nutrient content and manure sampling advice
- ISU: Average manure nutrient analysis
Nitrogen-Phosphorus-Potassium Calculator for Fertilizers
University-Provided Economically Optimal N Rate Resources
- Minnesota: Standard nirtrogen guidelines
- Nebraska Overview, Nebraska Corn Nitrogen Calculator
- Iowa: Nitrogen use in Iowa corn production
Video
- Nitrogen Contributions from Legumes in Extended Rotations – Presentation by Matt Liebman at PFI Conference