A system for harvesting nitrogen, comprising a motored robotic litter processing vehicle including an elongate housing creating an inner space for mounting components. A nitrogen harvester box connected to a rear portion of the vehicle is provided including a vacuum canopy connecting four sides to a floor, and wheels. A scoop level to ground having an opening facing the vehicle is enabled to collect litter material including nitrogen. A sieve screen having a mesh size positioned laterally at a height above the floor enables nitrogen particles smaller than the mesh size to fall through the sieve and nitrogen particles larger than the mesh size to be captured on a top surface of the sieve, wherein a vacuum chute collects the particles smaller than the mesh size and deposits them into a collection bin.

A working machine may work by moving frontward on a ground. The working machine may include: a battery; an electric motor comprising a stator and a rotor and configured to be driven by electric power supplied from the battery; a working unit configured to work on the ground by being rotated about a rotary axis by the electric motor, the rotary axis being substantially parallel to a virtual ground perpendicular to an up-down direction; and a transmitting unit configured to transmit rotation of the electric motor to the working unit. When the working machine is viewed from a front side with the working machine being in a working posture, the battery, the electric motor, and the working unit may be separate from each other in the up-down direction and the working unit may be disposed below the battery and the electric motor.

A method for a cylindrical device includes semi-helically oriented teeth, knives, or blades radially outward from an outer surface of the cylindrical device or rotor is provided. Each tooth, knife, or blade is part of a row of 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 knives may have sharpened edges that are oriented to cut on different planes as the cylindrical device rotates. The knives may be held in place by holders that have configurations to oriented the knives at certain angles.

An agricultural implement includes a main frame, a rotating blade assembly operatively connected to the main frame, the rotating blade assembly comprising a shaft having a plurality of blades mounted thereto, and a first grader blade and a second grader blade operatively connected to the main frame. Both the first grader blade and the second grader blade follow the rotating blade assembly such that in operation the plurality of blades positioned along the rotating blade assembly chop up a soil heave into smaller pieces of dirt and may for provide for pushing the soil towards a center. The first grader and the second grader may further push the dirt towards the center.

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 gimbal is provided for attaching an implement to a three-point hitch. The gimbal has an implement plate comprising a first side and a second side wherein attached to the first side is an upper implement bracket for coupling to an upper implement arm and a lower bracket for coupling to a lower implement arm wherein the second side comprises a retaining cavity. A tow plate is received in the retaining cavity and is rotational relative to the implement plate. The tow plate comprises lower brackets arranged to connect to lift arms of the three point hitch and an upper bracket arranged to connect to a stabilizer arm of the three point hitch.

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 .