Buried Underwear Soil Test Wins Ig Nobel Science Prize
The study validates a simple cotton-based method for measuring microbial soil activity across 1,000 Swiss test sites.
Updated on Oct. 26, 2026 in Botany
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The 2026 Ig Nobel soil science prize was awarded on September 3, 2026, for a study that utilized buried cotton underpants to assess soil microbial activity. This research-stage methodology quantifies health based on fabric decomposition rates observed across 1,000 burial sites.
Why it matters
The project demonstrates how simple, standardized physical substrates can effectively engage citizen scientists to track soil health. By standardizing organic material breakdown, researchers provide a scalable way to monitor soil as a living system at a national scale.
The study utilized 1,000 pairs of cotton underpants buried in soil, with 900 subsequent soil samples collected for analysis. Microbial activity was measured by physical fabric degradation after a two-month burial window, a technique adapted from an 11-year-old Canadian origin project.
The players
Franz Bender
Lead researcher and member of the Swiss team recognized for the 2026 Ig Nobel soil science award.
Marcel van der Heijden
Co-researcher on the Swiss study evaluating microbial activity through standardized fabric decomposition.
Atlant Bieri
Contributor to the Soil Your Undies project who helped coordinate the large-scale Swiss study.
Pia Viviani
Researcher and team member recognized for applying the Soil Your Undies methodology to Swiss soil ecosystems.
The details
The experiment relies on the principle that soil microorganisms decompose organic materials, specifically the cellulose in cotton fibers. By burying identical cotton underpants, researchers create a uniform test substrate that reveals varying levels of microbial activity based on the extent of fabric degradation visible after two months. This method provides a macro-level indicator of ecosystem function that does not require specialized lab equipment for initial field observations.
Timeline
2015: First Soil Your Undies experiment conducted in Ontario.
2017: Swiss researchers first learned of the Canadian project.
2019: Swiss team conducted a pilot project.
2021: Large-scale Swiss citizen science project involved 1,000 participants.
September 3, 2026: The Ig Nobel soil science prize was presented in Zurich.
The Tech Race
The Swiss experiment scales the original 2015 Canadian Soil Your Undies project into a national citizen science initiative. This project follows the established framework of using simple organic degradation to benchmark microbial soil health.
This project offers a practical, low-cost demonstration of soil health for agricultural managers and citizen scientists. While the study is complete, the standardized method is publicly accessible for those looking to monitor local soil decomposition rates over two-month cycles.
The takeaway
This research proves that large-scale ecological data can be gathered through standardized, accessible physical tests rather than complex sensors. Watch for further soil health reports that utilize this 'Soil Your Undies' method to compare no-till cover-cropped fields against traditional management sites.
Further reading
Explore more about current Botany research trends and methodologies.
Source note: This article includes information reported by Farmtario.
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