In order to transfer the weight of the track markers and thus the centre of gravity of the sowing combination still further to the front of the tractor, the track markers are fitted to the rotary cultivator or to the rotary harrow. A big benefit of this specification is that the track markers can be utilised, also during solo operation of the soil tillage implement, e.g. for primary tillage, or in conjunction with a precision air seeder. Thanks to the cranked marker arm, the track is clearly marked even in rough cloddy soils. In addition, the marker arms with integrated spring damping reduce the load from peak forces.