
Phosphorus: Rate guidelines, sources & best practices for Minnesota, Midwest farmers
From UMN Extension Nutrient Management Podcast by University of Minnesota Extension
March 17, 2026 · 40 min · Season 7 · Episode 6
About this episode
The episode discusses phosphorus management practices and guidelines for farmers in Minnesota and the Midwest.
Today on the Nutrient Management Podcast we discuss phosphorus with experts from Minnesota and across the Midwest. Why are Midwest phosphorus guidelines different from state to state? Are Minnesota's current P guidelines satisfactory - or do states' P guidelines need revision? Would a P-rate calculator that incorporates economics be a useful tool, similar to nitrogen's MRTN calculator? What 'Phosphorus & the 4R's' tips and suggestions do our Minnesota, Ohio, Illinois and South Dakota panelists recommend for area farmers? Nitrates and water quality issues continue to be top-of-mind - would switching P sources be beneficial? What new and ongoing phosphorus-related research projects are panelists watching? All this and much more on today's show. Guests: Daniel Kaiser, Extension nutrient management specialist (St. Paul) John Jones, soil fertility, plant nutrition, and nutrient management research, University of Illinois Urbana-Champaign (Champaign, IL) Jason Clark, Extension soil fertility specialist, South Dakota State University (Brookings, SD) Manbir Rakkar, assistant professor, soil fertility and nutrient management, The Ohio State University (Brewster, OH) Additional…
People in this episode
Guests: Daniel Kaiser, John Jones, Jason Clark, Manbir Rakkar
Topics covered
- phosphorus management
- agriculture
- nutrient guidelines
- water quality
- soil fertility
- 4R nutrient stewardship
Keywords
- phosphorus
- nutrient management
- agriculture
- water quality
- 4R's
- soil fertility
- Midwest guidelines
Mentioned in this episode
Organizations: University of Minnesota Extension, University of Illinois Urbana-Champaign, South Dakota State University, The Ohio State University
Places: Minnesota, Midwest, Illinois, South Dakota, Ohio
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