An improved combination of a powered combine carrying a combine grain bin (24) for housing harvested grain and a towed grain cart carrying a grain cart bin (30) for housing harvested grain includes improved harvested grain transfer between the combine grain bin and the grain cart bin and improved off-loading of harvested grain from the combination. A generally horizontally disposed first grain movement assembly (32) is pivotally connected within the combine grain bin and pivotally connected within the grain cart bin and disposed for reciprocally transporting grain between the combine grain bin and the grain cart bin. A generally vertically disposed second grain movement assembly (34) is cooperatively operable with the first grain movement assembly for transferring grain from the grain cart bin to the first grain movement assembly and thence to the combine grain bin. An off-loading grain movement assembly (26) is disposed for off-loading grain only from the combine grain bin.