Abstract: A convertible spreader-grader assembly convertible between a spreader-grader mode and a box scraper mode. The assembly includes a pair of spaced skid sleds, an interior framework positioned between and connected to them to maintain them in parallel longitudinal relation, and a hitch assembly connected to the framework for attaching the assembly to a suitable tractor. At least one cutter assembly extends between the skid sleds and is connected thereto by an adjustable mounting mechanism which provides for a plurality of positions of the cutting plate relative to the ground. For each position the blade assumes the same angle to the ground but has a different height of its lower edge relative to the ground. A plate extends between the skid sleds at a rear portion thereof. It is pivotally connected to them and can pivot between an upper horizontal position wherein earth and soil can pass underneath wherein the assembly defines its spreader grader mode.