Abstract: A device for separating clods and stones from the soil includes a frame adapted to be drawn or carried across the land and one or more elements carried by the frame for raising the surface layer of material from the land and passing it to a first conveyor having apertures therethrough to permit material on the conveyor to pass through the conveyor and to be returned to the land, there being disposed above the conveyor a surface adapted to bear against material on the conveyor so as to crush and/or abrade material on the conveyor and thereby reduce its particle size to permit it to pass through the apertures. The first conveyor is adapted to discharge particles of material retained thereon to a device for returning those particles to the land on either or both sides of the device. The surface and/or the first conveyor are adapted to move apart from one another to permit the passage therebetween of resistent material.