Abstract: A collapsible agricultural storage container having a base, and a plurality of side panels removably connected to the base panel and interlocked at their edges by elongated, removable corner members. Each side panel is adjacent to two other side panels, and each side panel has first and second edge portions having a key member extending therefrom. Each corner member has a pair of keyways that slidably receive the key members of adjacent side panels to interlock the side panels together. The side panels include a top edge portion having an aligning rail extending upwardly away from a stacking support for alignment of an upper storage container stacked atop a lower storage container. Each side panel also has a bottom foot portion that extends below the base panel and slopes inwardly of the aligning rail to a position directly below the stacking support.