Soil Biology and Ecology from UCSC Center for Agroecology and Sustainable Food Systems
This unit introduces students to the biological properties and ecosystem processes of agricultural soils, including the processes that can be managed to improve soil quality.

The Story of Fritz Haber
From Radio Lab. This story introduces how Fritz Haber discovered a way to pull nitrogen from the air and put it in the soil, a method now known as the Haber Bosch process, and explores the controversial outcomes of an initially well intentioned mission.

The FBI Song
A fun song to learn about the special little creatures who work hard to regenerate the soil