Unearthed: The Hidden World Beneath Our Feet | Soil, Microbes, Worms & Regeneration

What if the most important ecosystem on Earth is the one beneath your feet? In this episode of Six Inches of Soil, Richard Tufton and Claire Mackenzie bring together four leading voices in soil science, ecology, and regenerative agriculture to explore the hidden world beneath us. From microscopic bacteria and fungi to earthworms, aggregates, pore spaces, and carbon cycling, this conversation reveals why healthy soil is far more than dirt—it's a living ecosystem that underpins food production, water cycles, biodiversity, climate resilience, and human health. Joining us are soil microbiologist Andy Neal, soil health communicator Andie Marsh, soil educator and engineer Karen Johnson, and renowned regenerative agriculture advocate Ray Archuleta. Together they explore: • Why soil is alive • What healthy soil actually looks like • How microbes feed plants • Why soil structure matters more than most people realize • How soil influences flooding and drought • The surprising link between soil and human health • Compost, worms, regenerative farming, and the future of food If you've ever wondered why soil matters, this is the episode for you. Guests: Andrew Neal Soil microbiologist researching the relationship between soil structure, microbes, and plant productivity. X: @microbass1 Research papers: https://scholar.google.com/citations?... Andie Marsh Soil health specialist, educator, and creator of Soil Is Sexy. Website: https://www.rhizos.science/ Instagram:   / soilissexy   Substack: https://soilissexy.substack.com/ Ray Archuleta Known worldwide as "Ray the Soil Guy" and featured in the documentary Kiss the Ground. Website: https://www.raythesoilguy.life/ecothe... Featured in: https://kissthegroundmovie.com/ Karen Johnson Engineer and soil educator focused on rebuilding soils for climate resilience. She is a professor in the Department of Engineering, University of Durham. Key Takeaways ✅ Soil is a living ecosystem, not an inert growing medium. ✅ Healthy soil depends on biology, pore space, water, oxygen, and organic matter working together. ✅ Soil microbes help transform nutrients into forms plants can use. ✅ Regenerative farming can dramatically improve water infiltration and drought resilience. ✅ Children exposed to healthy soils may experience measurable benefits to immune function. ✅ Composting and worms can play a vital role in restoring biological activity. ✅ Much of society still undervalues soil despite its importance to food, climate, and human wellbeing. ✅ Soil literacy may be one of the most important educational gaps we need to address. Suggested Timestamps 00:00 Introduction: Why Soil Matters 04:30 Andie Marsh – "Soil Is Sexy" 10:15 Looking at Soil Through a Microscope 16:45 Andy Neal's Soil Fly-Throughs 24:10 Why Soil Structure Matters 32:20 Ray Archuleta: The Plant Is The Mouth Of The Soil 41:15 Rain Simulators & Slake Tests 50:20 Forest Soil & Children's Immune Systems 59:30 Why Healthy Soil Smells Different 1:08:10 Teaching Soil Literacy 1:15:45 Soil, Flooding & Drought 1:22:30 Johnson-Su Compost & Biological Fertility 1:33:15 Why Bare Soil Is A Problem 1:42:00 Composting At Home 1:48:00 Topsoil, Construction & Landfills 1:57:00 Final Reflections Sponsored By Fielden Most whisky grains are grown industrially using chemicals. Fielden is helping regenerate England's fields with heritage grains grown alongside clover without chemical inputs. Use code SOIL10 for 10% off: https://fielden.com Please drink responsibly. Watch the Six Inches of Soil Documentary If you enjoyed this conversation, watch the award-winning documentary that inspired this podcast and discover how regenerative agriculture can transform food, farming, and our future. 🌱 Get involved, watch the film, and learn more: https://www.sixinchesofsoil.org/getin... Subscribe If you're interested in regenerative agriculture, soil health, food systems, sustainability, farming, climate resilience, and the future of food, subscribe and join the conversation.