Abstract: An earth-working apparatus (1) having a drive (1?, 1?) located above the ground is described. The earth-working apparatus has at least two earth-working devices (300, 400), a first earth-working device (300) including a rotating cutter and agitator device (30) that penetrates into the ground to be worked, having first tools and a second earth-working device (400) including a comminuting device (40) having second tools. Each earth-working device (300, 400) is individually mountable on the drive. The earth-working devices (300, 400) may be individually mountable on the drive. It is also possible to combine two or more earth-working devices and to mount them together on the drive. A method for working particularly encrusted ground surfaces is also described.

Abstract: An earth-working apparatus (1) having a drive (1?, 1?) located above the ground is described. The earth-working apparatus has at least two earth-working devices (300, 400), a first earth-working device (300) including a rotating cutter and agitator device (30) that penetrates into the ground to be worked, having first tools and a second earth-working device (400) including a comminuting device (40) having second tools. Each earth-working device (300, 400) is individually mountable on the drive. The earth-working devices (300, 400) may be individually mountable on the drive. It is also possible to combine two or more earth-working devices and to mount them together on the drive. A method for working particularly encrusted ground surfaces is also described.

Abstract: There is described a device for the detection of objects lying in the earth which, irrespective of topography, soil structure and state of the terrain, permits high surface yields with great precision in identifying the position of the objects to be detected without endangering the operating personnel. On a mobile device (10) is arranged at least one jib (20) swivellable about a vertical axis, on whose free end are arranged adjacent to each other several measuring heads (40) for sweeping over strip-shaped surface areas (2a-d) of the terrain to be investigated. With the measuring heads (40) on the free end of the jib (20) at least one ground marking device (60) is arranged for distinguishing the find site determined by the measuring heads (40). The ground marking device (60) includes a paint spraying device (61) as well as a stake marking device (66) next to each measuring head (40).

Abstract: The process serves for the loosening of soil in the subsoil and topsoil areas and for introduction of fertilizers as well as subsoil loosening and/or for soil cultivation as well as the introduction of other additives with the use of digging tools 2, 2', and 2" by which the soil is broken up. In this case, the digging edge of digging tool 2, 2', and 2" is guided in an elliptical motion and this motion is superimposed by a straight motion, i.e., the driving motion. A cycloid is therefore produced for the digging edge. The longer axis of the ellipse in this case is directed from the soil surface into the soil in this manner and exhibits an angle to the travel direction. The additive, such as, for example, fertilizers, can be blown into the fissure forming behind tool 2.