Roller crimper (IMAGE) University of Barcelona Caption The roller crimper creates a thick layer of plant residues (mulch) connected to the soil via the roots. Credit Alejandro Pérez Ferrer Usage Restrictions Credit must be given to the creator. License CC BY 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.