Switchgrass (3 of 3) (IMAGE) DOE/Argonne National Laboratory Caption A bale of switchgrass is weighed after harvesting. The dry weight of the harvested switchgrass allowed Argonne researchers and collaborators to measure the yield of a mixture compared to yields of single varieties grown in isolation. The mixture sustained the highest overall yields over the course of the seven-year study. Credit Image provided by Julie Jastrow, Argonne National Laboratory 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.