Anti-slip cover for use on soil

The slip-resistant surface (11) for natural ground consists of at least one plate-form base component (12) which at least on one side has protrusions projecting out from a center plane of the base component. The protrusions may be provided on both sides and in the form of knobs. The knob-form protrusions have a support surface extending parallel to the center plane. The protrusions may be of various forms such as conical, pyramid, square or rectangular.