Wearable Sensors for Plants (IMAGE) Iowa State University Caption Iowa State University researchers have developed these "plant tattoo sensors" to take real-time, direct measurements of water use in crops. Credit Photo courtesy of Liang Dong/Iowa State University Usage Restrictions None 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.