Weed seeds are destroyed in the chaff from a combine harvester by primary and secondary destructors where the primary feeds to the secondary. The secondary can use repeated high speed impacts caused by a rotor mounted in one of a pair of side by side housings which accelerate the discarded seeds in a direction centrifugally away from the rotor onto a stator including angularly adjustable stator surfaces around the axis. The primary can also use an impact arrangement of a different and simplified structure or can use another destruction modality such as radiation. The primary is mounted at a transfer device including a transverse auger which carries the chaff and weed seeds from the rear of the sieve to the secondary

An agricultural harvester includes a chassis, and a residue handling system that receives a chaff flow and a residue flow into a flow passageway of the chassis. The residue handling system includes a chopper, a shroud at least partially surrounding the chopper, a spreader, and a moveable door panel assembly that is configured to be moved between a chopping mode position and a bypass mode position. The moveable door panel assembly includes a top door panel that is movably mounted to the top wall of the chassis, and a bottom door panel that is moveably mounted to the shroud. In the chopping mode position, the top and bottom door panels are positioned to permit the entrance of residue flow into the chopper. In the bypass mode position, the top and bottom door panels are positioned to either limit or substantially prevent the entrance of residue flow into the chopper.

An agricultural harvester includes a chassis, and a residue handling system that receives a chaff flow and a residue flow into a flow passageway of the chassis. The residue handling system includes a chopper, a shroud at least partially surrounding the chopper, a spreader, and a moveable door panel assembly that is configured to be moved between a chopping mode position and a bypass mode position. The moveable door panel assembly includes a top door panel that is movably mounted to the top wall of the chassis, and a bottom door panel that is moveably mounted to the shroud. In the chopping mode position, the top and bottom door panels are positioned to permit the entrance of residue flow into the chopper. In the bypass mode position, the top and bottom door panels are positioned to either limit or substantially prevent the entrance of residue flow into the chopper.

An agricultural harvester includes a straw hood having a hollow interior space for receiving material other than grain (MOG) from a threshing and separating system of the harvester and chaff from a cleaning system of the harvester. A drive system is provided for powering a straw chopper and a weed seed mill. The drive system includes a single belt positioned outside of the straw hood that is wound at least partially around (i) a straw chopper pulley that powers the straw chopper, (ii) a weed seed mill pulley that powers the weed seed mill, and (iii) a power take off shaft of the harvester that receives power from an engine or other power source of the harvester.

An agricultural harvester includes a straw hood having a hollow interior space for receiving material other than grain (MOG) from a threshing and separating system of the harvester and chaff from a cleaning system of the harvester. A drive system is provided for powering a straw chopper and a weed seed mill. The drive system includes a single belt positioned outside of the straw hood that is wound at least partially around (i) a straw chopper pulley that powers the straw chopper, (ii) a weed seed mill pulley that powers the weed seed mill, and (iii) a power take off shaft of the harvester that receives power from an engine or other power source of the harvester.

An agricultural harvester includes a straw hood has a top wall and side walls. The walls define a hollow interior space for receiving straw or material other than grain from a threshing and separating system of the harvester and chaff from a cleaning system of the harvester. A drive system is at least partially positioned within the hollow interior space. The drive system is configured to drive a seed mill that is connected to the agricultural harvester.

An agricultural harvester includes a straw hood has a top wall and side walls. The walls define a hollow interior space for receiving straw or material other than grain from a threshing and separating system of the harvester and chaff from a cleaning system of the harvester. A drive system is at least partially positioned within the hollow interior space. The drive system is configured to drive a seed mill that is connected to the agricultural harvester.

A system processes seeds that are present in crop material. The system includes a first shearing surface, a second shearing surface arranged opposite the first shearing surface, and a clearance between the first shearing surface and the second shearing surface. The system passes crop material between the first and second shearing surfaces, where the crop material contacts the shearing surfaces as it passes through the shearing surfaces. Contact with the first and second shearing surfaces damages seeds that are present in the crop material. The system can be installed in an agricultural harvester to damage seeds that are present in crop residue to prevent the seeds from germinating after the crop residue is discharged from the agricultural harvester back into the field.

A system processes seeds that are present in crop material. The system includes a first shearing surface, a second shearing surface arranged opposite the first shearing surface, and a clearance between the first shearing surface and the second shearing surface. The system passes crop material between the first and second shearing surfaces, where the crop material contacts the shearing surfaces as it passes through the shearing surfaces. Contact with the first and second shearing surfaces damages seeds that are present in the crop material. The system can be installed in an agricultural harvester to damage seeds that are present in crop residue to prevent the seeds from germinating after the crop residue is discharged from the agricultural harvester back into the field.

Weed seeds are destroyed in the chaff from a combine harvester by repeated high speed impacts caused by a rotor mounted in one of a pair of side by side housings which accelerate the discarded seeds in a direction centrifugally away from the rotor onto a stator including angularly adjustable stator surfaces around the axis. Thus the discarded seeds rebound back and forth between the rotor and the stator to provide a plurality of impacts. The seeds are carried axially of the rotor by a controlled airstream so that they move to an axial discharge location where a discharge fan is mounted. The angle of the discharge around the rotor axis can be changed to direct the seeds to the side of the combine away from a straw chopper, towards the guide fins of the tailboard of the chopper, or into the housing of the straw chopper.