Swiss Citizens Bury Underpants to Map Soil Health

One thousand Swiss citizens participated in a citizen science project, burying cotton underpants for two months to help map soil health across Switzerland. The findings of this experiment were published in the journal Plants People Planet, revealing significant impacts of land management on soil biology and quality. Marcel van der Heijden, an agroecologist at the University of Zurich and co-author of the study, stated that their results demonstrate how soil management practices can substantially influence both soil life and overall soil quality. He emphasized that biologically active and healthy soil is fundamental for agricultural fertility, efficient nutrient cycling, and a wide array of other essential ecosystem services. The study highlights the critical role of soil health in supporting agriculture, ensuring food security, and maintaining the health of the global ecosystem, noting a worldwide decline in soil health. A primary metric for assessing soil health is the rate at which complex organic matter decomposes. This process involves breaking down materials such as leaves, wood, and even organic remains into simpler organic and inorganic compounds, which in turn releases carbon dioxide and vital nutrients. Despite the importance of decomposition rates, there have been limited large-scale national studies that examine these processes across diverse land-use types. While smaller-scale investigations have indicated that human land-use practices can significantly alter the biological diversity within soils, this project aimed to provide a broader, national perspective. The experiment utilized cotton underpants as a standardized organic material to measure decomposition, offering a tangible and accessible method for citizen scientists to contribute to ecological research. By burying these items in various locations and soil types across Switzerland, researchers could collect data on how quickly the fabric degraded, correlating this with local environmental conditions and land management practices. The project underscores the value of citizen science in gathering extensive datasets that might be challenging or prohibitively expensive to collect through traditional research methods alone. The insights gained are expected to inform agricultural practices and conservation efforts aimed at improving and preserving soil health for future generations. The initiative also serves as an educational tool, raising public awareness about the intricate processes occurring beneath our feet and their profound impact on the planet's well-being. The data collected from this unique experiment will contribute to a more comprehensive understanding of soil ecosystems and their resilience in the face of environmental changes.