Hugelkultur is a composting method that uses large pieces of rotting wood as the centerpiece for long term humus building decomposition. The decomposition process takes place below the ground, while at the same time allowing you to cultivate the raised, or sunken, hugelkultur bed. This allows the plants to take advantage of nutrients released during decomposition. Hugelkultur, in its infinite variations, has been developed and practiced by key permaculture proponents such as Sepp Holzer and Masanobu Fukuoka for decades.
Via Michael G. Burns