Digging Deep: Understanding Soil Health and Fertility

In this episode of the Maine Farmcast, Dr. Colt Knight sits down with Dr. Jaime Garzon of UMaine Extension and Dr. Leandro Vieira from Louisiana State University to dig into what really makes soil healthy. The trio explores the critical relationship between soil fertility, structure, and biology, from pH and organic matter to microbial diversity and grazing management. Dr. Vieira shares his journey from a ranching family in southern Brazil to soil science research in the U.S., while Dr. Garzon explains how Maine’s acidic soils and high organic matter present both challenges and opportunities for producers.Listeners will gain a deeper understanding of why soil testing is the foundation of any fertility plan, how overgrazing affects both root structure and soil integrity, and why balancing nutrients is essential for forage production. With practical examples, lively discussion, and even a few Florida field stories involving hurricanes, gators, and raccoons, this episode blends science and humor to help farmers manage their land more effectively, one soil sample at a time.The University of Maine System (the System) is an equal opportunity institution committed to fostering a nondiscriminatory environment and complying with all applicable nondiscrimination laws. Consistent with State and Federal law, the System does not discriminate on the basis of race, color, religion, sex, sexual orientation, transgender status, gender, gender identity or expression, ethnicity, national origin, citizenship status, familial status, ancestry, age, disability (physical or mental), genetic information, pregnancy, or veteran or military status in any aspect of its education, programs and activities, and employment. The System provides reasonable accommodations to qualified individuals with disabilities upon request. If you believe you have experienced discrimination or harassment, you are encouraged to contact the System Office of Equal Opportunity and Title IX Services at 5713 Chadbourne Hall, Room 412, Orono, ME 04469-5713, by calling 207.581.1226, or via TTY at 711 (Maine Relay System). For more information about Title IX or to file a complaint, please contact the UMS Title IX Coordinator at www.maine.edu/title-ix/.