A hybrid flute for a stalk roll may be configured with a sharp edge positioned between a first blunt edge and a second blunt edge along a length of the flute edge. The flute edge may extend radially outward from a main cylinder of the stalk roll. The flute edge may be engaged with a radius at the base of the flute edge, and a flute base may extend from the radius. A plurality of flute bases positioned adjacent to one another may be configured to form a main cylinder for the stalk roll.

A hybrid flute for a stalk roll may be configured with a sharp edge positioned between a first blunt edge and a second blunt edge along a length of the flute edge. The flute edge may extend radially outward from a main cylinder of the stalk roll. The flute edge may be engaged with a radius at the base of the flute edge, and a flute base may extend from the radius. A plurality of flute bases positioned adjacent to one another may be configured to form a main cylinder for the stalk roll.

Differential speed stalk rolls mountable to a row unit of a row crop head. A first stalk roll body has an outer peripheral speed less than the outer peripheral speed of a second stalk roll body in lateral spaced relation. At least one of the first and second bodies includes a knife defining a knife plane normal to the axis of rotation of the first or second stalk roll. The stalk roll bodies may have modular and interchangeable body segments of different configurations.

A stalk roll mountable to a header of an agricultural combine for rotation about a rotation axis during processing of plant stalks has an annular drum with detachable blades. The stack roll has a plurality of circumferentially spaced flutes extending in an axial direction of the rotation axis of the drum and projecting radially outwardly from the drum. The flutes define mounting surfaces along lengths of the flutes. A plurality of blades are attachable to the drum with multiple of the plurality of blades being attachable to the mounting surface of a common one of the flutes. Mounting hardware is configured to removably connect the blades to the mounting surfaces of the flutes.

A row unit assembly for use with a corn harvester includes a first drive having an output shaft, a stalk roll that extends along a first axis and rotates about the first axis via the output shaft of the first drive. A second drive rotates a first drive member about a second axis that is substantially perpendicular to the first axis. A first conveyor extends around the first drive member and moves about the first drive member in response to rotation of the first drive member. A third drive rotates a second drive member about a third axis that is substantially parallel to the second axis. A second conveyor extends around the second drive member and moves about the second drive member in response to rotation of the second drive member.

A stalk roll for a corn harvester has a first portion including a first material having a first material density, and a second portion including a second material having a second material density. The first density is at least fifty percent greater than the second density, or the first tensile strength is at least fifty percent greater than the second tensile strength. The first portion includes a support portion that engages a drive shaft, a first radial portion extending radially outward from the support portion, a first blade connected to the first radial portion, a second radial portion extending radially outward from the support portion opposite the first radial portion, and a second blade connected to the second radial portion. The first and second blade portions engage a corn stalk. The second portion is positioned between the first radial portion and the second radial portion.

A stalk roll assembly for a corn harvester includes a first stalk roll having a first elongate cylinder and rotates about a first axis, and a second stalk roll has a second elongate cylinder rotates about a second axis. A third stalk roll has a third elongate cylinder, is positioned above the first stalk roll and rotates about a third axis, and a fourth stalk roll has a fourth elongate cylinder, is positioned above the second stalk roll and rotates about a fourth axis. A first plate is positioned between the first stalk roll and the third stalk roll, and a second plate is positioned between the second stalk roll and the fourth stalk roll. The first and second stalk rolls are spaced apart to separate corn ears from corn stalks.

A hybrid flute for a stalk roll may be configured with a sharp edge positioned between a first blunt edge and a second blunt edge along a length of the flute edge. The flute edge may extend radially outward from a main cylinder of the stalk roll. The flute edge may be engaged with a radius at the base of the flute edge, and a flute base may extend from the radius. A plurality of flute bases positioned adjacent to one another may be configured to form a main cylinder for the stalk roll.

A corn ear picking roller structure for strengthening stem grabbing includes a header, a seedling divider, a seedling pulling chain, a clamping chain, a seedling pressing plate, and an ear picking device. The seedling divider is connected to a front end of the header, the seedling pulling chain is connected to the header and located on a lower side of the seedling divider, the clamping chain is connected to the header and located on a lower portion of the seedling pulling chain, the ear picking device is connected to the header and located on one side of the seedling divider, and the seedling pressing plate is connected to a top end of the ear picking device. The ear picking device includes a left ear picking roller and a right ear picking roller, and each of the left and right ear picking rollers is provided with an inequilateral multi-edge structure.

One embodiment of a stalk roll to be mounted upon a stalk roll drive shaft of a corn harvesting header comprises a cylindrical shell with a recess in the main cylinder, wherein reduced flutes are not present in the recess, but full flutes are present therein. This embodiment includes a stalk slot having a length equal to the length of the recess. Additionally, the flutes may be configured such that a stalk engagement gap is present at least once during a full revolution of two opposing stalk rolls.