Agricultural knife with primary and secondary serrations

A knife with a serrated cutting edge for use on an auger of an agricultural feed mixer, the knife comprising:

• a plate having at least a leading edge forming a plurality of teeth seats arranged in a stepped configuration along the leading edge, each of the plurality of teeth seats including a face edge surface and a back edge surface converging to form a notch;
• and
• a plurality of elongate cutting elements, each of the cutting elements being affixed to one of the teeth seats formed by the leading edge, each of the cutting elements forming a portion of the serrated cutting edge, each of the cutting elements having a top surface and a bottom surface opposite of the top surface, the cutting edge being located on the top surface and the bottom surface being affixed to one of the teeth seats of the leading edge of the plate;
• wherein the serrated cutting edge has a plurality of primary serrations and a plurality of secondary serrations, each of the cutting elements forming at least one of the primary serrations and at least one of the secondary serrations.