Mobile harvesting unit

A mobile harvesting unit for harvesting “graff”, a mixture including grain, chaff and weed seeds, including a wheeled harvester body and a harvester header at the front of the harvester body for cutting a crop from a field area, the harvester body containing a threshing unit for the cut crop for separating stalks from graff, a discharge for discharging separated stalks back to the field area, and a storage tank for storage of the separated graff, wherein the storage tank has a well at a rear of the tank, and the tank has a floor provided with a movable surface, or elements that move over said floor, to convey graff rearwardly in the tank to said well, wherein a collection bed for graff is provided beneath the threshing unit, and the collection bed includes a transverse graff collection trough at a rear end thereof, and a plurality of rotatable augers for moving graff rearwardly towards the trough, and wherein the transverse graff collection trough houses a pair of co-axial augers for transferring graff to opposite lateral ends of the graff collection trough, and a pair of graff elevators is provided, one at each lateral side of the storage tank, for lifting graff from the opposite lateral ends of the graff collection trough and transferring the graff to the storage tank.