We’re ready to get our hands dirty as we explore the stuff beneath our feet. Clay, sand, mud — soil is everywhere. And it’s alive! We’ll find out how it helps plants grow and learn about all the little organisms that are invaluable in the process (hint: it involves something called the “poop loop”).

The Dolores Huerta Elementary School garden is a project of the Social Justice Learning Institute. Find out more about their work here.

Richard Hayden is head gardener with the Natural History Museum of Los Angeles County. Find out more about his work.

This episode was originally published on August 12, 2014. Listen to the original here:

Soil: Can you dig it?
by MPR