A threshing system (100, 200) for an agricultural harvester, the threshing system comprising: A. a rotor (120, 220) comprising an elongated body, the elongated body having: - a first end adapted to receive material from a feeding mechanism; and - a second end opposite the first end; and B. a substantially cylindrical cage (150, 250) that surrounds at least a portion of the rotor (120, 220), the cage comprising an inner surface (156, 263) spaced radially apart from the rotor to define a threshing space (142, 242) between the rotor and the cage; wherein: the rotor (120, 220) is configured to rotate relative to the cage (150, 250) about a first axis of rotation to axially convey material from the first end of the rotor toward the second end of the rotor; the threshing system (100, 200) comprises a material flow adjustor (170, 270) for controlling axial movement of material through the cage, the material flow adjustor being movably mounted adjacent to the threshing space (142, 242) and comprising at least one material conveying edge adapted to enter the threshing space; and the material flow adjustor (170, 270) is moveable between a first operative position, in which the at least one material conveying edge is spaced from the rotor (120, 220) in a radial direction by a first distance, and a second operative position, in which the at least one material conveying edge is spaced from the rotor (120, 220) in the radial direction by a second distance, the second distance being less than the first distance, characterized in that the material flow adjustor (170, 270) is configured to rotate about a second axis of rotation, the second axis of rotation extending parallel to and radially offset from the first axis of rotation of the rotor (120, 220). A. a rotor (120, 220) comprising an elongated body, the elongated body having: - a first end adapted to receive material from a feeding mechanism; and - a second end opposite the first end; and - a first end adapted to receive material from a feeding mechanism; and - a second end opposite the first end; and B. a substantially cylindrical cage (150, 250) that surrounds at least a portion of the rotor (120, 220), the cage comprising an inner surface (156, 263) spaced radially apart from the rotor to define a threshing space (142, 242) between the rotor and the cage; the rotor (120, 220) is configured to rotate relative to the cage (150, 250) about a first axis of rotation to axially convey material from the first end of the rotor toward the second end of the rotor; the threshing system (100, 200) comprises a material flow adjustor (170, 270) for controlling axial movement of material through the cage, the material flow adjustor being movably mounted adjacent to the threshing space (142, 242) and comprising at least one material conveying edge adapted to enter the threshing space; and the material flow adjustor (170, 270) is moveable between a first operative position, in which the at least one material conveying edge is spaced from the rotor (120, 220) in a radial direction by a first distance, and a second operative position, in which the at least one material conveying edge is spaced from the rotor (120, 220) in the radial direction by a second distance, the second distance being less than the first distance, characterized in that the material flow adjustor (170, 270) is configured to rotate about a second axis of rotation, the second axis of rotation extending parallel to and radially offset from the first axis of rotation of the rotor (120, 220).