Dr. Arne Kappenberg (2 of 2) (IMAGE) University of Bonn Caption from the Institute of Crop Science and Resource Conservation (INRES) at the University of Bonn with an extract of fire residues. Credit (c) Photo: Volker Lannert/Uni Bonn Usage Restrictions This photo may be used with the press release. 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.