The Making of Terra Preta at the Ithaka Institute

We call it Swiss Terra Preta but as you can see it's just a technique of making biochar-compost with an adapted feedstock blending and a highly oxygenized process. We use 10 to 80% biochar in the blend depending on the end-use of the substrate. Rock powder and clay is essential. Biochar should never dust. Turning the small windrows every day during the first two weeks and then every three days the next four weeks and you will get highly fertile black soil after four weeks. Thanks to staring Paul Taylor on the tractor! Further information on how to produce Terra Preta like substrates can be found in the Ithaka Journal: Ways of Making Terra Preta (http://www.ithaka-journal.net/wege-zu...)