THE invention shows a device for seed furrow in a field, which has a mobile structure with a series of SHARP IN THE FORM OF DISCO (11) arranged adjacent to each other and transverse to the direction of forward movement (V) Y TRANSPORTABLE about a horizontal axis (10). ACCORDING TO THE INVENTED THE CUTTING EDGE (11A) of each blade (11) as disc has an offset which varies continuously, SO THE DIFFERENCE BETWEEN THE LARGEST AND LESS THAN THE SHAFT DISTANCE THE LIES CLEAVER IN MAGNITUDE OF DEPTH OF CUT AND BLADE HAS ONE OR MORE EXTERNAL PROJECTIONS.
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