Switchgrass (IMAGE) Michigan State University Caption Michigan State University research shows that perennial crops' evapotranspiration did not differ greatly from corn -- a finding that contrasts sharply with earlier studies. Credit Courtesy of Michigan 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.