injection manure (IMAGE) Penn State Caption The difference between a field treated with injected liquid manure (left) and broadcasted manure is obvious in this comparison photo. Injecting manure reduces ammonia volatilization and soluble phosphorus runoff from crop fields. Credit Robert Meinen,Penn State Usage Restrictions non commercial use only License Original 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.