A feeder drum used in an agriculture head to force the cut crop through an opening of said head. More specifically, this feeder drum is used to produce the transition from the lateral movement of the crop through the platform to a transverse longitudinal movement (with respect to lateral movement) which directs it to the platform carriers feeder. Even more specifically, the feeder drum comprises a plurality of fins or blades attached to a cylinder, wherein said fins are characterized by containing one side with a profile describing a convex curve.