Robots tending crops (IMAGE) Iowa State University Caption Researchers at the University of Illinois Urbana-Champaign have developed small-scale robots that can fertilize, weed and cull single plants in a field. This photo shows testing in an Iowa State University soybean plot. Credit Photo by Ashlyn Rairdin and courtesy of Soumik Sarkar/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.