Agricultural Field Experiment (IMAGE) Cell Press Caption Field experiments are conducted, e.g., to explore the environmental effects of crop rotations. Here an experiment aiming at environmental nitrogen management is shown. Credit Institut für Gartenbauliche Produktionssysteme, Leibniz Universität Hannover Usage Restrictions Credit Required. 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.