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 channels of which are bounded by the ribs. Rolling bearings (8) are housed in casing (9) mounted on the outside of hollow tubular tube-vane (1) and fixed to it by an upper part. Spherical cutting disc (2) is rigidly fixed on the side of the ploughshare movement at the lower end of bearing housing (9) of rolling bearings (8).EFFECT: improved efficiency of the ploughshare is ensured.1 cl, 3 dwgИзобретение относится к области сельскохозяйственного машиностроения, в частности к орудиям для посева. Сошник содержит полую трубчатую стойку-семяпровод (1), в которой жестко закреплены по направлению движения сошника две параллельные продольные перегородки, разделяющие поперечное проходное сечение стойки-семяпровода (1) на три равные по площади части. Сферический режущий диск (2) закреплен с возможностью вращения относительно продольной оси стойки-семяпровода (1) от контакта с почвой. В полости сферического режущего диска (2) на нижнем торце стойки-семяпровода (1) со стороны
