An agricultural implement having an infeed cutter includes a plurality of knives and at least one knife-sharpening assembly. The knives are mounted on shiftable knife beds that swing into and out of an operating position. The beds are laterally slidable in opposite directions to provide access to the knives. The knife-sharpening assembly includes a hood and a plurality of sharpening stones mounted on a shaft that moves along a path corresponding to the shape of the cutting edges of the knives, meaning the sharpening stones preferably follow the substantially arcuate contour of the uppermost edges of the knives during the course of sharpening. The hood is configured to contain any sparks produced by the interaction between the stones and knives. The knife beds and sharpening assemblies are configured such that sufficient ground clearance for travel of the agricultural vehicle is available during sharpening of the knives.
