COMBINED SKID PLOUGHSHARE Russian patent published in 2010 - IPC A01C7/20 

FIELD: agriculture.

SUBSTANCE: invention is related to working elements of sowing machines and is intended for sowing of fine seed crops, for instance flax, rape and grasses, and their dressing into soil with addition of fertilisers. Ploughshare comprises ski-shaped skid, furrow maker - fertiliser feeder, scraper bar - seed feeder and stand for suspension. Scraper bar - seed feeder of tubular section comes out through skid below sliding plane by distance that exceeds depth of seeds dressing. In its lower part furrow maker - fertiliser feeder and scraper bar - seed feeder have skew cut of outlet hole and are bent for development of working surface to form compacted bed. Furrow maker - fertiliser feeder and scraper bar - seed feeder may move vertically. Knife is rigidly fixed in front part of skid. Two vertical plates are attached on working surface of skid, which are installed at the angle in direction of ploughshare motion, which provide for closure of furrows with soil.

EFFECT: improved crop capacity due to introduction of fertilisers to depth that exceeds depth of seeds dressing, and even dressing of seeds into soil to depth onto compacted bed.

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