Willow harvest (IMAGE) American Society of Agronomy Caption A forage harvester is the machine used to cut and chip the willow in the field during harvest. A bar bends the stems forward and a circular blade cuts them. The stems are then chipped. Wood chips are loaded into a dump truck driving alongside the harvester. Credit Armen Kemanian Usage Restrictions For use with this 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.