Steve LaMar, ARS Technician (IMAGE) American Society of Agronomy Caption ARS technician Steve LaMar measures canopy height in early spring to determine when to put cattle on the pasture. Credit Photo credit Lou Saporito, ARS. Usage Restrictions Please 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.