A disc holder and scraper construction for disc harrows comprises a disc element fixed to a rotary hub, which is supported by a disc holder spring in turn fixed to a framework of a disc harrow, the disc holder construction further comprising a scraper assembly for removing soil adhering to a disc element, the scraper assembly being affixed to a flexible disc scraper arm, which is in turn affixed to the disc holder spring; the disc scraper arm, affixed to the disc holder spring and not to the harrow framework, supports the scraper assembly and is driven in a timed manner with respect to the disc element.

A ground engaging agricultural blade, coulter, or disc having a central opening adapted to be attached to an implement for rotation about a substantially horizontal axis of rotation; the coulter or disc have an outer periphery; and plurality of step plane notches disposed in the outer periphery. The blade can be used with a hub disposed around the central opening or a spacer spool on a shaft extending through the central openings of adjacent blades, the spacer spools extending radially outwardly by a distance.

A coulter disc mounting assembly for a tillage implement supports a coulter disc thereon to be angularly offset from the forward working direction of the implement. The tillage implement typically includes a frame supporting a plurality of tool shanks thereon, each having a mounting surface adapted for mounting a respective shovel opener thereon in which the mounting surface has a width which is substantially perpendicular to the forward working direction. The disc mounting assembly has a hub with a mounting surface for fastening against the mounting surface of one of the tool shanks in which the hub supports a coulter disc thereon such that the coulter axis is oriented non-perpendicularly to the forward working direction.

An implement for preparing a seed bed has a front row of vertical discs, followed by three rows of shanks, followed by harrows and then rolling baskets. A hydraulic cylinder is mounted between each shank and the implement frame and exerts a constant selected trip bias force on the shanks that is adjustable up to 1300 pounds. The implement frame is configured such that a total weight on the wheels when the ground engaging tools are in the raised transport position is greater than about 850 pounds per foot of width of the implement frame. The implement is towed at speeds of at least seven miles per hour with the shanks penetrating the soil to a depth of three inches or more. Residue is cut and buried and the field surface left firm and smooth.

A ground engagement tool, such as a universal coulter, with an integrated offset to facilitate multiple mounting configurations. In some embodiments, the ground engagement tool includes a polygonal shank, defining, for example, an octagonal or hexagonal cross-section. The polygonal shank enables rotational offset to be secured in discrete rotational orientations. A lower bracket is mounted to a spindle, providing an angular displacement range for angular deflection of the ground engagement tool. The spindle includes a key structure that complements the angular orientations of the polygonal shank so that the lower bracket can be compensated for the rotational offset. A rotational indexing plate enables selection of one of a plurality of angular displacement ranges. Retention rods may be implemented for setting a depth of the tool. A dirt deflector may also be provided, dimensioned to prevent spewing dirt from landing on adjacent plant rows and to prevent fouling in muddy conditions.

A cultivator is provided for cultivating a field. The cultivator can have a frame with a tow assembly so that the cultivator can be towed by a tractor. A cultivating assembly can be provided pivotally attached to the rear of the frame. The cultivating assembly can have a plurality of discs that engage and penetrate the soil beneath the cultivating assembly. The cultivating assembly can have a center section pivotally connected at the to the rear end of the frame, a first wing section pivotally connected to one side of the center section, a second wing pivotally connected the other side of center section where all the sections have discs connected to them. A pair of ground wheels can be provided connected to the center section so that the ground wheels are positioned in front of the cultivating assembly when it is being used to cultivate a field.

An agricultural planter with seed trencher discs and seed delivery mechanism is disclosed which deposits seeds or product in the trench opened by the discs. Multi-functional wheels are mounted rearward of the trencher discs on an adjustable arm so as to provide a depth gauging function for the trencher discs. The wheels are mounted to run at an angle and distance corresponding to the disc blades so as to movably scrape clean dirt and debris from the disc blades opening the trench. The wheels are positioned to move displaced trench soil back over the trench while effectively running at a position where dirt and debris try to lift out of the opening trench due to the action of the disc cutting blades.

A cultivator can have a frame with a tow assembly so that the cultivator can be towed by a tractor. A cultivating assembly can be pivotally attached to the rear of the frame. The cultivating assembly can have a plurality of discs that engage and penetrate the soil beneath the cultivating assembly. The cultivating assembly can have a center section pivotally connected to the rear end of the frame, a first wing section pivotally connected to one side of the center section, a second wing pivotally connected to the other side of center section where all the sections have discs connected to them. A pair of ground wheels can be connected to the center section so that the ground wheels are positioned in front of the cultivating assembly when it is being used to cultivate a field.

A towable tool includes a frame extending over a width in an X-axis direction, a length in a Y-axis direction, and a height in a z-axis direction. A plurality of ground-contacting support wheels are rotatably coupled with the frame. A plurality of ground-working discs each rotatably coupled with a respective rigid shank. Each rigid shank is received and selectably retained in a respective receptacle of the frame.

A tool assembly for an agricultural implement includes a ground-engaging tool mounted to the implement support frame by an assembly of a support post, a mounting bracket and a frame mount. At least one of the support post and the mounting bracket includes a substantially cylindrical rod and a collar having an axial opening configured to receive the rod. An interface arrangement may provide multiple contact areas between the support post and the collar. A recessed pocket may retain a nut that threads onto set screw used to engage the rod, such as at a detent recess, and fix the position of the support post with respect to the mounting bracket. The mounting bracket may provide for alternate fore-aft and lateral mounting orientations.