38:34
Recreating Terra Preta: Good Soil for Centuries! (Complete Film)
David The Good
10:01
Does My Homemade Terra Preta Work? [Side-By-Side Bed Comparison]
4:23
Making Terra Preta: Did It Work? Let's Dig It!
1:19:13
The Mysteries of Terra Preta - REVEALED?
9:34
Recreating Terra Preta: I Think We're Getting Closer
14:49
Improving the soil for generations - with soup cans!?
9:01
Recreating Terra Preta: The Search for Ancient Composting Secrets
