Rottwirtschaft

For rotting , forest stands are felled every 15 to 20 years and parts of the wood are burned on the area that has become free. What remains is ash, which is equivalent to a primitive fertilization . This is enough for one to two years to grow grain . The expulsion of the remaining root fragments forms the over the next 15 to 20 years Niederwald . This is then mostly used as firewood and the rotting cycle starts all over again.