A system for sampling of plant product is provided that comprises a mobile platform, at least one primary bin, and a harvesting subsystem connected to the mobile platform. The harvesting subsystem harvests the plant product as the system traverses a plot and projects it across the length of the primary bin(s) against a back wall of the primary bin(s), whereby the separated plant products collides with the back wall and falls into the primary bin. The system additionally includes at least one sample volumizer connected to the back wall of each primary bin. Each sample volumizer has a specified fixed volume and receives and collects a sample of the plant product, wherein each collected sample collected has the specified fixed volume. The system further includes at least one sample receiving subsystem structured and operable to receive and collect a sample from a respective sample volumizer.