A foldable auger comprising: a first auger assembly comprising a first housing extending along a first axis, and a first auger screw mounted within the first housing to rotate about the first axis; a second auger assembly comprising a second housing extending along a second axis, and a second auger screw mounted within the second housing to rotate about the second axis; a pivot joining a distal end of the first housing to a proximal end of the second housing, the pivot being configured to permit the second auger assembly to move relative to the first auger assembly between a first housing position in which the second axis is not coaxially aligned with the first axis, and a second housing position in which the second axis is coaxially aligned with the first axis; a first drive coupler located at a distal end of the first auger screw and offset from the first axis; and a drive sleeve located at a proximal end of the second auger screw and rigidly connected to the second auger screw, and a second drive coupler located at the proximal end of the second auger screw and offset from the second axis, characterized by: the drive sleeve comprising at least one slot offset from and extending parallel to the second axis; and the second drive coupler extending into the slot and being movable within the slot parallel to the second axis between a first coupler position in which the second drive coupler is in driving connection with the first drive coupler when the second housing is in the second housing position, and a second coupler position in which the second drive coupler is not in driving connection with the first drive coupler when the second housing is in the second housing position. a first auger assembly comprising a first housing extending along a first axis, and a first auger screw mounted within the first housing to rotate about the first axis; a second auger assembly comprising a second housing extending along a second axis, and a second auger screw mounted within the second housing to rotate about the second axis; a pivot joining a distal end of the first housing to a proximal end of the second housing, the pivot being configured to permit the second auger assembly to move relative to the first auger assembly between a first housing position in which the second axis is not coaxially aligned with the first axis, and a second housing position in which the second axis is coaxially aligned with the first axis; a first drive coupler located at a distal end of the first auger screw and offset from the first axis; and a drive sleeve located at a proximal end of the second auger screw and rigidly connected to the second auger screw, and a second drive coupler located at the proximal end of the second auger screw and offset from the second axis, characterized by: the drive sleeve comprising at least one slot offset from and extending parallel to the second axis; and the second drive coupler extending into the slot and being movable within the slot parallel to the second axis between a first coupler position in which the second drive coupler is in driving connection with the first drive coupler when the second housing is in the second housing position, and a second coupler position in which the second drive coupler is not in driving connection with the first drive coupler when the second housing is in the second housing position. the drive sleeve comprising at least one slot offset from and extending parallel to the second axis; and the second drive coupler extending into the slot and being movable within the slot parallel to the second axis between a first coupler position in which the second drive coupler is in driving connection with the first drive coupler when the second housing is in the second housing position, and a second coupler position in which the second drive coupler is not in driving connection with the first drive coupler when the second housing is in the second housing position.