Abstract: A shallow concavity scalloped disc blade particularly suitable for vertical tillage applications is disclosed. The disc blade comprises a generally circular plate having a peripheral radially toothed cutting edge, a smooth central portion configured to mountingly engage a harrow or like agricultural implement, and a curved scalloped (or fluted) portion adjacent to the central portion, the curved scalloped (or fluted) portion having a plurality of scallops formed between the flat central portion and the edge. The radius of curvature of the curved scalloped (or fluted) portion preferably is between about 850 mm and about 1000 mm, and more preferably about 900 mm.

Abstract: An implement has a tongue used to tow the implement that can be raised or lowered with respect to the rest of the implement. The tongue is raised or lowered by a hydraulic cylinder. The raising and lowering ports of the cylinder are connected to two hydraulic accumulators to permit the tongue to flex up or down while the implement is towed through the field. These accumulators are disconnected from the cylinder when the wings of the implement are lifted and the implement is towed over the road to prevent the implement from oscillating backwards and forward about an axis defined by its wheels.

Abstract: An improved soil-working implement. The implement comprises a shank having a free-end portion; a one-piece adapter defining a recess, wherein the adapter is removably affixed to the shank free-end portion; a one-piece shovel; and an elastomeric element frictionally removably retained within the recess of the adapter.