Use of urban wastes (sewage sludges and refuse composts) for reforestation on low fertility zones in arid zones.

Sewage sludges from waste water treatment plants or composts from municipal refuse composting plants will be increasingly available in southern Mediterranean countries. Agronomic and public health arguments are used to advocate the use of recycled municipal organic wastes in reforestation, since this is both economically feasible and silviculturally desirable, and minimizes the environmental and public health risks from such wastes. The rehabilitation (reforestation) of argan (Argania spinosa) based agroforestry systems in SW Morocco is used as a possible example