For more than a century, soil samples collected across Illinois quietly preserved a record of how the land changed over time. Beginning in 1899, fields throughout the state were carefully mapped and sampled to document distinct soil layers, creating a unique archive of Illinois’ agricultural history.
This program explored the University of Illinois Soil Lab’s Centennial Soil Archive Project and revealed how these historic samples helped researchers understand long-term changes in farming practices, soil health, and climate. Participants also learned about ongoing resampling efforts across the state and how they could take part.
University of Illinois Extension develops educational programs, shares knowledge, and builds partnerships to support people, communities, and the environment as part of the state’s land-grant institution.
Serving as the public outreach arm of the University of Illinois Urbana-Champaign and the College of Agricultural, Consumer and Environmental Sciences, Extension reaches all 102 Illinois counties through a network of 27 multi-county units and more than 700 staff statewide. Its work is guided by eight strategic priorities and delivered through six program areas, including 4-H youth development, agriculture and agribusiness, community and economic development, family and consumer sciences, health, and natural resources.