Steven Hall

Steven Hall is an Assistant Professor and Extension Specialist in the Department of Plant and Agroecosystem Sciences at the University of Wisconsin-Madison (UW-Madison), College of Agricultural & Life Sciences. Previously, he held roles as Assistant and Associate Professor in the Department of Ecology, Evolution, and Organismal Biology at Iowa State University. His research focuses on agroecosystem water quality, soil carbon dynamics, and nutrient management in agricultural landscapes, with an emphasis on how redox conditions, geochemical factors, and microbial communities influence carbon sequestration and greenhouse gas emissions. He obtained a PhD in Ecosystem Science from UC Berkeley and MS/BS degrees from UW-Madison in Environment and Resources/Botany, respectively.

His educational background includes studies at the University of California-Berkeley (PhD, Ecosystem Science), University of Wisconsin-Madison (MS, Environment & Resources; BS, Botany). Research priorities include evaluating conservation practices, crop diversification, and novel fertilizer technologies for environmental benefits. The Hall Lab employs mesocosm experiments, isotopic tracing, and continental-scale datasets to address challenges in climate-smart agriculture and water quality preservation.

Research highlights include groundbreaking work on iron-driven carbon decomposition mechanisms, microbial controls on lignin mineralization, and nitrous oxide emissions from tile-drained soils. Recent studies emphasize the role of poorly drained depressions as nutrient leaching hotspots and the unexpected carbon losses from anaerobic soils, challenging existing biogeochemical models.

Advising and grants involve mentoring current graduate students (Moira Keith, Hariom Yadav) and undergraduate researchers. Opportunities to join his lab depend on funded projects. Collaborations include the International Soil Radiocarbon Database (ISRaD) and partnerships with institutions like the Savanna Institute. The lab is situated in Moore Hall, Plant Sciences Building, with outreach activities through UW-Madison's extension programs.

Key infrastructure includes automated gas flux measurement systems and soil block mesocosms. Ongoing work integrates machine learning with NEON soil data to model organic carbon dynamics, while field studies explore digestate amendments and biochar impacts. His research bridges laboratory experiments with landscape-level observations to inform sustainable agricultural practices.