How do we build organic matter on farms without over-fertilizing our soils? And what are realistic goals for increasing organic matter? In this episode, Natalie Hoidal interviews Dr. Nic Jelinski, a soil scientist at the University of Minnesota. They talk about soil formation, how organic matter accumulates in soil, broadening our metrics for soil health, and how different practices like compost additions and cover crops contribute to organic matter in the longer-term.