Fluorescence Measured from Land Plants (IMAGE) NASA/Goddard Space Flight Center Caption The magnitude of fluorescence portrayed in this visualization prompted researchers to take a closer look at the productivity of the US Corn Belt. The glow represents fluorescence measured from land plants in early July, over a period from 2007 to 2011. Credit NASA's Goddard Space Flight Center 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.