Harvester Weights Switchgrass Biomass (IMAGE) American Society of Agronomy Caption Harvesting switchgrass biomass samples with a flail harvester. Machine cuts and picks up biomass, blows it through a chute, weighs the biomass, and dumps in a wagon. Students pull random samples for dry matter determination. Credit M. Casler Usage Restrictions For use with story only 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.