Replacing What's Removed: Phosphorus And Potassium

Replacing What's Removed: Phosphorus And Potassium

From The Dirt: an eKonomics podKast by Mike Howell

May 26, 2026 · 46 min · Season 5 · Episode 13

About this episode

This episode explores the management of phosphorus and potassium removal and replenishment in soil with Dr. Vaughn Reed.

What happens when crops remove phosphorus and potassium from the soil, and what does it take to replenish them? In this episode, we're in the classroom at Mississippi State University sitting down with Dr. Vaughn Reed to explore how to manage nutrient removal and replenishment by thinking about your soil like a bank account. From what's immediately available to the crop versus what takes time to become available, to how different soils respond to replenishment and the economics of rebuilding fertility levels, we break down how phosphorus and potassium behave in the soil and how to think about removal and replacement across soil types. Plus, Dr. Reed shares what growers should consider when making replenishment decisions under tight margins, and answers questions about removal and replacement from across the classroom. Looking for the latest in crop nutrition research? Visit nutrien-ekonomics.com Subscribe to our YouTube channel: https://www.youtube.com/@NutrieneKonomics

People in this episode

Host: Mike Howell

Guest: Dr. Vaughn Reed

Topics covered

  • nutrient management
  • phosphorus
  • potassium
  • soil health
  • crop nutrition
  • agriculture economics

Keywords

  • phosphorus
  • potassium
  • soil management
  • crop nutrition
  • nutrient replenishment
  • agriculture

Mentioned in this episode

Organizations: Mississippi State University, Nutrien Ekonomics

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