Collection boxes (IMAGE) Penn State Caption Using measuring chambers like those shown here, researchers found that nitrous oxide emissions peaked a few weeks after manure was applied and for a short period after fertilizer was applied. Identifying how to time organic nitrogen amendments with corn uptake represents an opportunity to reduce nitrous oxide emissions from dairy production systems, the researchers said. Credit Maria Ponce de Leon, Penn State 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.