A land clearing attachment for a tractor device includes semi-helically oriented teeth, knives, or blades radially outward from an outer surface of a rotor. Each tooth, knife, or blade is part of a row of independent teeth, knives, or blades. Each row is oriented with an offset angle such that the spirally orientation completes angular offset of about 90? or less. The spiral or helical orientation of the cutting teeth, knives, or blades enables the power to be reduced typically required to effectively rotate a similarly sized rotor.

A knife for a cylindrical rotor includes at least two sharpened edges adapted to cut materials during land clearing or mulching. The knife further includes a top surface and a bottom surface wherein the knife is shaped as an inverted frusto-square pyramid. The knife may further include a tapered sidewall defining one sharpened edge. The angle may be about 30? to about 60?. The knife may have four sharpened edges. The knife further may include an aperture that may be equidistant from the four sharpened edges. The knife is adapted to be moved when one sharpened edge becomes dull. The knife may further include a conical countersunk aperture. The knife may have a thickness of about ? to about ?.

A knife for a cylindrical rotor includes at least two sharpened edges adapted to cut materials during land clearing or mulching. The knife further includes a top surface and a bottom surface wherein the knife is shaped as an inverted frusto-square pyramid. The knife may further include a tapered sidewall defining one sharpened edge. The angle may be about 30? to about 60?. The knife may have four sharpened edges. The knife further may include an aperture that may be equidistant from the four sharpened edges. The knife is adapted to be moved when one sharpened edge becomes dull. The knife may further include a conical countersunk aperture. The knife may have a thickness of about ? to about ?.

A machine for picking up rocks from soils having a structure suitable for being moved over the surface of the soil, by means of a pair of side wheels, being towed by a tractor vehicle from which it receives movement through its power take-off. The machine has rock extraction and uprooting elements incorporated on the advancing edge of the machine, made in the form of teeth, associated with a tooth bar region of the structure of the machine, having certain play, a rotating movable feed reel with teeth, a conveyor belt for lifting said rocks up through an inclined plane from a leading edge to a trailing edge located at a greater height; a rock collection and accumulation hopper arranged on the trailing edge.

A machine for picking up rocks from soils having a structure suitable for being moved over the surface of the soil, by means of a pair of side wheels, being towed by a tractor vehicle from which it receives movement through its power take-off. The machine has rock extraction and uprooting elements incorporated on the advancing edge of the machine, made in the form of teeth, associated with a tooth bar region of the structure of the machine, having certain play, a rotating movable feed reel with teeth, a conveyor belt for lifting said rocks up through an inclined plane from a leading edge to a trailing edge located at a greater height; a rock collection and accumulation hopper arranged on the trailing edge.

A gardening system includes a drive shaft operably coupled to first and second shafts for driving the first shaft in a first direction and the second shaft in a second direction. A first ground manipulation device is attached to the first shaft. A second ground manipulation device is attached to the second shaft.

An agricultural implement includes a disk blade assembly including a hanger, a first disk blade, and a second disk blade. Furthermore, the agricultural implement includes a fastener coupling the hanger to a frame member of the agricultural implement. Additionally, the agricultural implement includes a first load sensor configured to generate data indicative of a first load applied to the fastener at a forward side of the frame member by the disk blade assembly. Moreover, the agricultural implement includes a second load sensor configured to generate data indicative of a second load applied to the fastener at the aft side of the frame member by the disk blade assembly. In addition, the agricultural implement includes a computing system configured to determine when at least one of a first disk blade bearing or a second disk blade bearing has failed based on the data generated by the first and second load sensors.

An agricultural implement includes a disk blade assembly including a hanger, a first disk blade, and a second disk blade. Furthermore, the agricultural implement includes a fastener coupling the hanger to a frame member of the agricultural implement. Additionally, the agricultural implement includes a first load sensor configured to generate data indicative of a first load applied to the fastener at a forward side of the frame member by the disk blade assembly. Moreover, the agricultural implement includes a second load sensor configured to generate data indicative of a second load applied to the fastener at the aft side of the frame member by the disk blade assembly. In addition, the agricultural implement includes a computing system configured to determine when at least one of a first disk blade bearing or a second disk blade bearing has failed based on the data generated by the first and second load sensors.

An autonomous soil sampling device. The device including a vehicle for generally autonomously navigating a given area for sampling and adapted with systems to generally avoid obstacles during maneuvering. The device including a soil sampling system designed for placement on a platform of the vehicle and including an extraction arm having a probe and auger to probe into the soil for extracting a quantity of soil. The extraction arm rotationally received on a housing and movable to an inverted position for depositing the quantity of extracted soil into a packaging assembly for collection, labeling, and storage of the individual samples.

An autonomous soil sampling device. The device including a vehicle for generally autonomously navigating a given area for sampling and adapted with systems to generally avoid obstacles during maneuvering. The device including a soil sampling system designed for placement on a platform of the vehicle and including an extraction arm having a probe and auger to probe into the soil for extracting a quantity of soil. The extraction arm rotationally received on a housing and movable to an inverted position for depositing the quantity of extracted soil into a packaging assembly for collection, labeling, and storage of the individual samples.