Sorghum (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption A field of sorghum, a grain that is often used as a biomass crop for production of ethanol and butanol. Credit Marilyn Chung/Berkeley Lab Usage Restrictions Use credit 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.