Cooperators conducted 78 research trials last year. View the highlights in our “2023 Cooperators’ Report Program.”
Resources to Determine Economical N Rate
Resources for Determining Economical Nitrogen Rate
PFI Research on N 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)
Estimating Nutrient Content of Manure
- UMN: Average manure nutrient content and manure sampling advice
- ISU: Average manure nutrient analysis
N-P-K 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