Abstract: The invention relates to a combine agricultural machine (1) comprising a planting device (3), in particular a potato planting device, provided with at least one storage container (10), an extraction device associated thereto, a setting plow (7) and an downstream mounted end damming device (4). A loosening tool (2) for preparing a seedbed is arranged upstream of the planting device (3) in a travelling direction and one or several wheels (18) for disintegrating soil and supporting the machine are mounted upstream of said loosening tool (2) in said travelling direction. The invention also relates to a method for mechanically planting seeds comprising a stage for preparing the seedbed, a sowing stage and a final damming stage which are simultaneously carried out by means of tools mounted on the agricultural machine (1).