A grain cart includes a supplying container and a grain transfer element coupled to and configured to receive grain from the supplying container. The grain transfer element is inclined upwardly, forwardly, and laterally outwardly from the supplying container. A control spout is coupled to and projects laterally outwardly from the grain transfer element. A first control spout actuator is configured to move the control spout about a first axis between a forward discharge direction and a rearward discharge direction to direct discharged grain forwardly and rearwardly into a receiving container. A second control spout actuator is configured to move the control spout about the second axis between a generally downward discharge direction and a laterally outward discharge direction to direct the discharged grain generally downwardly and laterally outwardly into the receiving container.

An automated grain unloading system includes at least one sensor and a processor. The at least one sensor is configured to detect an interface between an upper surface of a grain mound in the receiving container and an interior surface of a wall of the receiving container, at least a portion of an upper edge of the wall, and an orientation of the grain transfer element. The processor is configured to compare the detected interface and the detected portion of the upper edge to the detected orientation of the grain transfer element, and to control the operation of the grain transfer element to direct a transfer of grain from the supplying container to the receiving container based at least in part on a result of the comparison of the detected interface and the detected portion of the upper edge to the detected orientation of the grain transfer element.