Carbon in Agriculture Explained: Fast, Slow & Stable Soil Carbon | AG & Culture Podcast Ep. 4

Carbon might be the most misunderstood element in agriculture.

In Episode 4 of the AG & Culture Podcast, Mike Usry and Joseph Boehm cut through the political buzzwords and break carbon down into practical, real-world soil science.

What actually matters when we talk about carbon in soil?

Is carbon emissions the real conversation farmers should be having?

And why is carbon the foundation of plant nutrition?

This episode covers:

• What soil carbon really is (without the hype)

• The difference between fast, slow, and stable carbon

• Why carbon feeds microbes — and microbes feed plants

• How root exudates create “fast carbon”

• The role of compost and humic substances in slow carbon

• What biochar is (in plain English) and why it matters

• How carbon improves soil structure and water retention

• What Cation Exchange Capacity (CEC) means and why it’s important

• Why sandy soils struggle with nutrient retention

• How to increase soil carbon naturally

• No-till vs over-tillage and its impact on carbon cycling

• The relationship between carbon, microbes, and nutrient delivery

Mike explains why carbon is the primary element for soil life — even more foundational than anything listed on a fertilizer bag.

If you’re a:

– Farmer

– Rancher

– Homesteader

– Lawn care professional

– Gardener

– Or someone curious about regenerative agriculture

This episode will help you understand how carbon impacts everything from water retention to nutrient cycling to long-term soil fertility.

📌 Key Takeaway:

If you want healthier soil, start with roots. Grow living roots. Let them decay naturally. Build carbon from the ground up.

Coming up next: Scaling backyard systems to commercial operations.

Listen now and subscribe for deeper conversations on soil biology, regenerative systems, and the cultural roots of agriculture.