http://www.youtube.com/watch?v=WddekwA23dk&feature=relmfu
Sepp Holtzer reveals some of his secrets to his success in this mini-documentary, namely his use of terraces and raised beds in his farming. The former technique has been implemented by farmers for centuries, only to be abandonned in the wake of conventional farming. The latter is fairly new and Holtzer puts his own spin on it putting a layer of various organic matter under the surface. Both of thesse techniques help to create a microclimate around the plants. Terracing especially helps to stop soil erosion and thus allows for greater moisture retention. Holtzer thus has need for irrigation. The special raised beds help the plants to stay warm, allowing them to stay active even during winter under the snow.