What can a pair of underpants tell you about your vegetable garden?

What can a pair of underpants tell you about your vegetable garden?

This summer, 115 participants in Leiden and The Hague worked with scientists from Leiden University to investigate the soil life in their community garden plots. With mangetout peas, a taste test, a buried pair of underpants and a harvest festival, they helped scientists better understand the connection between soil, plants and people.