Episode
The EW Podcast - Joel Simmons with Lawrence Mayhew - The Chemistry Behind Healthy Soil
- Podcast
- The EarthWorks Podcast
- Published
- Jul 30, 2026
- Duration seconds
- 3451
- Processing state
not_requested
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Summary
Lawrence Mayhew, “The Chemist of EarthWorks,” joins Joel Simmons for a wide-ranging conversation about humic substances, soil biology, nutrient efficiency, and the evolving science behind Biological Soil Management. Lawrence explains how humic substances moved from being poorly understood and difficult to label to becoming widely used for improving nutrient bioavailability and fertilizer performance. The discussion explores rhizophagy, the process through which plants cultivate microbes, bring them into their roots, extract nutrients, and release them back into the soil to repeat the cycle. Lawrence and Joel also examine the importance of enzymes, trace elements, carbon diversity, micronization, and complex product formulations in creating biologically active soils and longer-lasting turf responses. The central message is that reducing fertilizer inputs requires more than simply applying less product. It requires changing the soil system so microbes, chemistry, and physical soil conditions work together more efficiently. Visit EarthWorks at: https://www.earthworksturf.com Podcasts: https://www.earthworksturf.com/earthworks-podcasts/ EW Turf Talks: https://www.earthworksturf.com/2-minute-turf-talks/