Tina Casey writes in CleanTechnica.com,
The world’s first demonstration facility for the large scale production of Amazonian “dark soil” is under construction in Hengstbacherhof, Germany. Dark soil, also known as terra preta, is a manmade, ultra-fertile soil that was first developed thousands of years ago in Amazon communities. The buzz about terra preta is its [...]
From the monthly archives:
Hydroponics Dictionary

