COMBINED PLOUGHSHARE Russian patent published in 2011 - IPC A01C7/20 

FIELD: agriculture.

SUBSTANCE: ploughshare includes a vertical disk knife installed on a bracket, which ensures matching of the traction force direction with the ploughshare motion direction. A seed duct and a fertiliser duct are installed behind the bracket. In the lower part of the disk knife there are furrow makers installed to lay seeds and to apply fertilisers, in a coupled manner with its side surfaces at both sides. Furrow makers comprise wedge-like tips and cheeks. The wedge-like tips are inclined towards a horizontal plane in a motion direction at the angle of weeds sliding friction and are coupled with the cheeks. The upper edge of the wedge-like tips is diverted away from the disk knife by an angle ensuring fixation of seeds and fertilisers along the row axis. The furrow makers are fixed to the bracket with the help of sides. The furrow makers have vertical furrow limiters arranged behind the cheeks along the width to locate a seed duct and a fertiliser duct. The limiters are connected to furrow-closing hoes diverted towards the row axis side and arranged away from the furrow bottom at the height providing seeds and fertilisers gripping and covering with moist soil. The fertiliser duct and the furrow-closing hoe to close fertilisers are displaced forward relative to a seed duct and a furrow-closing hoe to close seeds at the distance, providing formation of a soil layer between seeds and fertilisers. A rolling wheel is fixed to the bracket with the help of leashes with the possibility of adjustment along the height. The rolling wheel is arranged in the form of truncated cones installed oppositely with smaller bases.

EFFECT: invention makes it possible to ensure appearance of stable even shoots due to simultaneous performance of seeding and fertiliser application operations with their closing with moist soil layers and separation of seeds and fertilisers with a soil layer.

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