Check it out: The Black Box of Soil Organic Matter and Soil Health

By Sonia A. Hall

Two men bent over a shovelful of soil in a harvested wheat field.
The connection between soil health and carbon sequestration are complex, but advances in soil biology are teasing them out. Photo: Ron Nichols/USDA NRCS under CC BY 2.0.

A number of recent articles focused on soil health (see for example this article on a soil health NRCS resource  and one on decomposition of wheat residues research). These articles commented on why soil health is important from a climate change perspective: more carbon-rich organic matter in the soil contributes to soil health, and also means less carbon as carbon dioxide in the atmosphere. So the potential exists for a win-win situation. As most things in life and agriculture, the connections between improved soil health and increased carbon sequestration are not as simple as they sound. Check out Andy McGuire’s elegant blog article describing why advances in soil biology—a foundational component of soil health—are important. He explains that it is not because they “change everything,” but because they help clarify why some things work and some don’t as much, and explain how complex that connection between soil health and carbon sequestration in soils appears to be. And though we may not want to hear it, we need this understanding to determine where the win-win practices that both increase soil health and sequester more carbon might realistically be. So take a few minutes to read McGuire’s article—it’s well worth the time!