Phosphorus fertilizer guidelines: Four Midwest experts talk profit, yield, soil tests & more

In this episode of the Nutrient Management Podcast, we’re talking about phosphorus fertilizer guidelines in Minnesota and throughout the Midwest. What are current state guidelines throughout the region, and are they satisfactory? Should farmers forgo taking a soil test to measure P levels, or should the test be prioritized? Might state phosphorus guidelines need to be revised, and if so, in what ways? What guidance or advice pertaining to phosphorus guidelines would our panel tell growers?

TRANSCRIPT

Guests:

• Daniel Kaiser, Extension nutrient management specialist (St. Paul)
• Antonio P. Mallarino, Professor emeritus, nutrient management, Iowa State University (Ames, IA)
• John Jones, Soil Fertility, plant nutrition, and nutrient management research, University of Illinois Urbana-Champaign, (Urbana-Champaign, Il)
• Dorivar Ruiz Diaz, KSU Professor, Soil fertility and nutrient management, Kansas State University (Manhattan, KS)

Additional resources:

• Phosphorus and potassium
• Corn fertilizer guidelines
• What is the best soil test option for phosphorus?
• FRST Fertilizer Recommendation Support Tool launches nationwide to digitize crop nutrient management
• No P, no problem? Skipping phosphorus fertilizer application may make agronomic, economic sense (October 2022)
• Confused about differences in phosphorus fertilizer sources? Here are the facts.
• 5 things to know about removal-based P and K strategies (November 2022)
• P and K “fixation” in the soil: What you need to know (November 2022)
• September 2022 podcast: P and K fertilizer guidelines: Why do they differ from state to state?

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Support for the Nutrient Management Podcast is provided by Minnesota's fertilizer tonnage fee through the Agricultural Fertilizer Research & Education Council (AFREC). Learn more at MNsoilfertility.com.