Fertiliser drills and seed drills (13) mounted so as to swivel on drill arms (40) are arranged on the frame (6) of a pneumatic single-corn sowing machine, viewed in the direction of travel. A working implement designed as a roller (15) is located therebetween in order to reconsolidate the soil turned by the fertiliser drill (12), to precompress the soil between the working implement (14) and the seed drill (13), and to provide a depth guide for the single-corn sowing machine.