Injection (IMAGE) Penn State Caption Both conservation scenarios simulated in the research decreased nitrous oxide emissions by reducing denitrification, but the scenario that included manure injection, shown here, retarded 91 percent of the nitrogen volatilization that occurred in the broadcast-manure scenario. Credit Karsten Research Group Usage Restrictions non commercial use only 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.