Agricultural Stream (IMAGE) Virginia Tech Caption Maury Valett, associate professor of biological sciences at Virginia Tech, samples the water in a well next to an agricultural stream. Credit Jack Webster Usage Restrictions To illustrate articles or reports about Virginia Tech stream research. 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.