FIELD: agriculture; engineering.SUBSTANCE: invention relates to the field of agricultural engineering, in particular to tools for sowing. Ploughshare comprises hollow tubular column-semiconductor (1), in which two parallel longitudinal partitions are rigidly fixed in the direction of movement of the ploughshare, separating the cross-sectional cross-section of column-vas deferens (1) into three parts equal in area. Spherical cutting disc (2) is rotatably supported relative to the longitudinal axis of vasa-seed post (1) from contact with the soil. In the cavity of spherical cutting disc (2) on the lower end of rack-seed pipe (1) from the direction of movement of the ploughshare, curved shape diffuser (3) is mounted, three fan-shaped guide channels of which are installed under corresponding parts of the cross-section of hollow tubular column-vortex (1), formed by partitions. Diffuser (3) is arranged to be replaced and located to the side, reverse to the direction of movement of the ploughshare, the fan-shaped ch
