Abstract: The apparatus is a rear extension on a conventional round baler that already produces round bales partially wrapped with plastic around only their cylindrical surface. The additional structure includes a table to receive the bale and rotate the bale so that the unwrapped surfaces face forward and back, after which pivoting arms aligned with the sides of the baler clamp the bale, lift it off the table, and rotate it end over end to continue the wrapping process around the previously uncovered ends. When the bale is completely wrapped, the baler's knife cuts the plastic sheet, and the arms continue pivoting rearward before releasing the bale onto the ground.

Abstract: A propulsion unit for a tractor includes a diesel engine and two electrical machines. The diesel engine and the two electrical machines are connected mechanically to a device for subdividing and re-combining of the output powers delivered by the diesel engine and delivered or absorbed by the electrical machines. The electrical machines are capable of operating both as generators and as motors. The propulsion unit is operable such that in at least one interval of the ground speed of the tractor, the electrical fraction of the power delivered or absorbed by the electrical machines is zero.