H₂S Control for Liquid Manure Land Application Practices - Injection/Incorporation

Injecting manure during land application or incorporation of manure shortly after surface application can best prevent odorous emissions that occur as a result of land application. Estimated costs to inject manure are $0.003 per gallon above the cost to haul and broadcast liquid manure. A portion of the added cost can be recaptured in the form or decreased nitrogen losses for injected manure versus broadcast application. Although hydrogen sulfide impacts have not been documented, field tests in Iowa demonstrate odor reduction ranging from 50-75 percent with injection as compared to broadcast application. Similar results would be anticipated for hydrogen sulfide. Based on these reports, great benefits can be realized by incorporating after broadcast application as well. NOTE: In Iowa certain separation distances for land application of manure must be implemented for certain types of facilities if the manure is broadcast.

Extension Publications

• PM 1972a Practices to Reduce Hydrogen Sulfide from Livestock Operations (pdf)
• PM 1972b Practices to Reduce Hydrogen Sulfide from Livestock Operations Flowchart (pdf)
• EDC 162h Air Quality and Animal Agriculture (pdf)
• PM 1936 Air Quality Resources for Iowa Animal Agriculture (pdf)
• PM 1935 Gaseous Emissions from Animal Agriculture (pdf)
• PM 1754e Iowa Odor Control Demonstration Project - Soil Injection (pdf)

Abstracts, Conference Proceedings, Presentations and Reports

Journal Articles

Newsletter Articles

Other Links

• Section 3 Outdoor Air Quality (MWPS-18)
• DNR 113 Separation Distances for Land Application of Manure (pdf)