is surrounded by two closely planted rows of Salix viminalis or other willow cuttings; this living wall of willow can then be woven into a hurdle-like structure and its annual growth can be harvested.

See also

* Arborloo, a similar concept, in which excrement goes into a hole in the ground and, when the hole starts to fill, the outhouse is moved to another hole, and a tree is planted in the old hole.
*Ecological sanitation

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