The invention is a method for recultivation of degraded areas, during which a soil substitute (20) is created on a degraded area by utilising a communal wastewater sludge (22) originating from wastewater treatment, and preferably by additional microbiological treatment, the soil substitute (20) being suitable for growing vegetation. The method is characterised by determining, in an examination step (11), a composition of a structural material (24) of the degraded area and a dry matter content of the wastewater sludge (22), and then - in a measuring step (12), for creating the soil substitute (20), measuring out such a quantity of a biological type organic material containing the wastewater sludge (22) to the structural material (24) of the degraded area, that the ratio of these base materials is the following in the soil substitute (20) in percent by weight (wt%) relating to the dry matter content of the base materials o 50 to 70 wt% structural material (24) originating from the degraded area, and o 30 to 50 wt% biological type organic material, of which at least two-third is the wastewater sludge (22) and the remaining part of which is other biological organic waste； and mixing the base materials in a mixing step (13). Thereafter, preferably, achieving the required microbiological composition of the soil substitute is facilitated by a microbiological treatment step.L'invention concerne un procédé de remise en culture de zones dégradées, consistant à créer un substitut de sol (20) sur une zone dégradée par utilisation de boues d'épuration communales (22) provenant d'un traitement d'eaux usées et, de préférence, ayant subi un traitement microbiologique supplémentaire, ce substitut de sol (20) étant approprié à la croissance de végétation. Le procédé est caractérisé en ce qu'il consiste à : déterminer, dans une étape d'examen (11), une composition d'une matière de structuration (24) de la zone dégradée et une teneur en matière sèche des boues d'épuration (22) ； puis m
