In a unique scientific experiment, soil ecologist Franz Bender engaged 1,000 volunteers in Switzerland to bury and retrieve underwear as part of a study on soil health. The unconventional research project led to surprising findings, with the buried underwear often being consumed by underground microbes. Published in Plants People Planet in August 2026, the study highlighted the vibrant life present in soil that is typically overlooked.
The idea of burying underwear as a soil health indicator originated in Canada, where the Innovative Farmers Association of Ontario initiated the “Soil Your Undies” campaign in 2017. This initiative aimed to raise awareness about soil health and the importance of viewing soil as a living ecosystem. The campaign garnered widespread participation, including senators, school children, and members of various organizations, emphasizing the fun and educational aspects of the project.
Inspired by the Canadian effort, Bender and his team in Switzerland organized a large-scale citizen science project involving 1,000 participants. The volunteers received organic cotton underwear and teabags to bury in designated locations, following detailed instructions provided by the research team. The study utilized a smartphone app for data collection and additional information sharing.
Upon excavation, it was observed that the buried underwear had undergone varying degrees of decomposition, with private gardens exhibiting the highest levels of degradation. Contrary to expectations, farm soil showed less decomposition, highlighting the complexity of soil health dynamics. Bender emphasized the importance of understanding soil vitality and the potential impacts of human activities on soil ecosystems.
The study not only provided valuable insights into soil health but also served as a creative way to engage the public in discussions about soil conservation. The project received international media coverage, drawing attention to the significance of soil health and the need for further research in this field. Experts like Asim Biswas and Joann Whalen praised the initiative for its innovative approach to soil assessment and its potential to encourage public interest in soil conservation practices.
Additionally, the collaboration between Bender’s team and a fashion designer to repurpose the excavated underwear into new clothing items showcases the project’s broader impact and unique outcomes. The study’s success underscores the importance of unconventional methods in scientific research and the potential for citizen science initiatives to drive meaningful discoveries in environmental science.