Weed seeds are destroyed in the chaff from a combine harvester by repeated high speed impacts caused by a rotor which accelerates the discarded seeds in a direction centrifugally away from the rotor mounted on a driven shaft onto a stator. Thus the discarded seeds rebound back and forth between the rotor and the stator to provide a plurality of impacts. The destructor is formed in two parts with one part mounted on or coaxially with a suitable drive shaft in the straw stream such as the chopper rotor shaft. The other part is mounted on a second shaft where both shafts are driven by a common belt which connects an output shaft of the combine with both shafts. The two parts of the destructor are mounted outside of a side wall of the straw hood.

An agricultural residue chopper assembly comprising a housing defining a partially enclosed cutting chamber, with respective sections of housing wall extending between an inlet and outlet, a cutting knife assembly comprising a plurality of knives extending radially to define a cutting volume, a counterknife assembly comprising one or more counterknives positioned to extend into the cutting volume, a first shear bar positioned near a downstream closing of the housing outlet, a second shear bar positioned downstream of the first shear bar near an upstream opening of the housing inlet, and an air catch formed by a radially expanded section of the housing wall between the downstream closing of the housing outlet and the upstream opening of the housing inlet. Also, an agricultural harvester machine having a residue chopper assembly.

An agricultural residue chopper assembly comprising a housing defining a partially enclosed cutting chamber, with respective sections of housing wall extending between an inlet and outlet, a cutting knife assembly comprising a plurality of knives extending radially to define a cutting volume, a counterknife assembly comprising one or more counterknives positioned to extend into the cutting volume, a first shear bar positioned near a downstream closing of the housing outlet, a second shear bar positioned downstream of the first shear bar near an upstream opening of the housing inlet, and an air catch formed by a radially expanded section of the housing wall between the downstream closing of the housing outlet and the upstream opening of the housing inlet. Also, an agricultural harvester machine having a residue chopper assembly.

A bale spreading apparatus comprising a box frame which retains a bale of material, a conveyor on which a bale rests, the conveyor being operative to urge the bale in a longitudinal direction towards a spreader head which ejects bale material from the apparatus, wherein the spreader head comprises one or more rotors, the or each rotor comprising a vertically mounted rotatable shaft and a series of blades being mounted on at least one of said shafts.