Harvesting corn stover (IMAGE) Iowa State University Caption Iowa State University researchers recently field-tested a system they're developing to harvest corn stover (the stalks, cobs and leaves) and grain with one pass through a field. Credit Iowa State University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.