#55: Phosphorus: A Technical Conversation with Blake Hadley
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#55: Phosphorus: A Technical Conversation with Blake Hadley
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In this deep-dive episode of the Crop Cast, Sean Nettleton and agronomist Blake Hadley unpack the complex world of phosphorus in soil systems, exploring its chemical, biological, and physical dynamics. Blake discusses how his self-taught, data-driven approach led him to simplify soil science through visual frameworks that connect redox potential (Eh), pH, and biological activity. Together they challenge traditional thinking—like the fixation on the “perfect” soil pH or the outdated simplicity of Liebig’s Law of the Minimum—and instead advocate for a holistic, living-soil perspective.
Listeners learn how microbial processes, residue breakdown, and carbon-phosphorus ratios influence availability, why biological activity (and even rain) drives phosphorus mineralization, and how stratification, soil tests, and new extraction methods like Haney’s H3A are shifting how agronomists think about fertility.
The episode blends soil science with philosophy—urging growers to measure, question, and evolve their management instead of relying on outdated models.