The inventive device comprises a plough (10) that can be coupled to a tractor and comprises a chassis (12) bearing a plurality of shovels (22D,22G), whereby the shape of said shovels is adapted in order to be able to turn up and mix a wet material (M) spread on the soil on the surface of said soil, in addition to comprising a tank (24) for a treatment liquid, a pump (26) that is connected to the tank and a sprinkling ramp (34) arranged at the rear of the chassis and connected to the pump in order to dispatch treatment liquid over the material that has been turned up and mixed by the shovels. The invention can be used with spreading materials, especially sludge from treatment plants.