In this episode, Carl Coleman continues his deep dive into the lessons learned from years of soil health experimentation—and how they changed not only his farm but his entire career. Carl shares how the pushback he received from scientists and extension professionals led him to set up a randomized, replicated study on his farm, proving that regenerative practices could reduce inputs without sacrificing yield.

We explore some of the biggest surprises from these trials, including how fields with no applied potassium actually maintained or increased soil test levels over five years—completely contradicting conventional wisdom. Carl also discusses the economic and agronomic benefits of cover crops, including how they have helped farmers reduce subsoiling, cut back on herbicide passes, and save thousands in input costs.

Carl’s transition from farming to the seed business was not planned, but as demand for high-quality, affordable seed grew, he saw an opportunity to help other farmers navigate the complexities of cover cropping. Now, as the owner of Choice Ag, Carl provides tailored cover crop blends based on individual farm needs, ensuring that growers avoid common mistakes and maximize their returns.

If you’re wondering how real-world farmers are making regenerative agriculture work economically, this episode is packed with practical insights and hard-earned wisdom.

📌 Check the show notes for links to Carl’s seed business, research studies, and resources mentioned in this episode!

Resources Mentioned in This Episode

• How much fertilizer do we really need?  https://experiment.com/projects/how-much-fertilizer-do-we-really-need
• No but seriously now, how much fertilizer do we really need?  https://experiment.com/projects/no-but-seriously-now-how-much-fertilizer-do-we-really-need
• Cotton, Country Conservation: An 8-Year Case Study in Regenerative Agriculture (Following SC Farmer Sonny Price's path of reducing input costs, increasing organic matter, and saving over $2.5 million): soilhealthlabs.com/projects/cotton-country-conservation