A root-crop harvester is configured to temporarily store tubers by recirculating tubers on the conveyor system of the harvester. The conveyor system has selectable first and second operating configurations. In the first operating configuration the conveyor system transports tubers from the digger bed to an outlet where tubers are unloaded from the harvester (e.g., onto a truck). In the second operating configuration the conveyor system transports tubers along the conveyor system for a period of time and then diverts tubers to an earlier position within the conveyor system, thereby recirculating tubers on the harvester. After a period of time, the harvester operator selects the first operating configuration and the recirculating tubers along with newly dug tubers are unloaded from the harvester.