Hügelkultur is concerned with growing plants on piles of rotting wood, as a form of raised bed gardening and composting in situ.An English loanword from German, it means "mound garden." Toby Hemenway, noted Permaculture author and teacher, considers wood buried in trenches to also be a form of hugelkultur referred to as a dead wood swale. Hugelkultur is practiced by Sepp Holzer as a method of forest gardening and agroforestry, and by Geoff Lawton as a method of dryland farming and desert greening. When used as a method of disposing of large volumes of waste wood and woody debris, hugelkultur accomplishes carbon sequestration. It is also a form of xeriscaping.