steven put out a good vid yesterday rambling about ash and char and a few other things. he referenced a vid from 1996 as well. its pretty interesting as well.
Video based on research by Melissa Leach and James Fairhead. West Africa's transition zone is one of the world's most ecologically fragile areas and is widely assumed to be experiencing a deforestation crisis. For a century experts have held villagers responsible. But recent research in Guinea shows the exact opposite. Instead of disappearing, forest cover has in fact been increasing - due to farmers' skill in transforming savanna into forest. This video explains how the research team's anthropological research combined with oral histories, archives, and aerial and satellite images to produce these findings. It gives voice to villagers and shows how easily experts can reach wrong conclusions if they ignore local knowledge and history.
I just found Skilcult over the weekend and watched a couple of his char videos. Pretty interesting. Certainly enough for me to give it a shot on one of my garden spots. I always have plenty of brush to burn.
Bio char is a pretty simple magic, and seems to have been well hidden, like most simple diy solutions, just a rotting brush pile of fairly neutral wood can provide a good sponge, but if it is too harsh it needs to be chared first.