Soil working machine

Claim 1

A soil cultivating machine comprising: a pair of frame units extending rearwardly divergently to each other, each of said frame units having a respective front tool-holding bar and rear tool-holding bar; a respective shaft rotatably mounted on each of said frames between said respective front bar and rear bar; a plurality of tilling discs mounted on said respective shafts and rotatably fixed thereto for the joint rotation therewith, said discs being adjustable to change the positions thereof along said shaft; a plurality of first plowshares adjustably mounted on said respective front bars, each of said first plowshares being positioned directly in front of a tilling disc relative to the direction of advance of said machine; a plurality of second plowshares adjustably mounted on said respective rear bars and extending forwardly beneath said discs, said second plowshares being laterally offset from said first plowshares, said first and second plowshares being formed by shanks having pointed tips; means on said machine for adjusting the divergence of said frame units; a plurality of ground engaging wheels mounted on said machine and vertically displaceable for adjusting the penetration depth below ground level of said first and second plowshares; and means on each of said frame units for vertically displacing said respective shaft thereof for adjusting the penetration depth of said discs below ground level.