Ammonia Emission Control for Liquid Manure Land Application Practices - Manure Amendment/Additives

Research has demonstrated that some products can effectively reduce ammonia losses through either a binding or a pH effect. Urease inhibitors may also prove effective. Costs are product-specific, and often determined as much by application rate and frequency as by the cost per unit weight. Following land application of fresh chicken slurry amended with calcium chloride, a reduction in ammonia losses of 37 percent was found. Aluminum sulfate, ferrous sulfate, and phosphoric acid reduced ammonia volatilization from litter by 96,79, and 93 percent, respectively. Aluminum sulfate is often recommended as an amendment, due the enhanced phosphorus content of the litter following addition of phosphoric acid, and to toxicity concerns associated with addition of ferrous sulfate.

Extension Publications

• PM 1971a Practices to Reduce Ammonia Emissions from Livestock Operations (pdf)
• PM 1971b Practices to Reduce Ammonia Emissions from Livestock Operations Flowchart (pdf)
• PM 1990 Instruments for Measuring Concentrations and Emissions Rates of Gasses and Particulates from Animal Feeding Operations (pdf)
• EDC 162h Air Quality and Animal Agriculture (pdf)
• PM-1935 Gaseous Emissions from Animal Agriculture (pdf)
• PM-1936 Air Quality Resources for Iowa Animal Agriculture (pdf)

Abstracts, Conference Proceedings, Presentations and Reports

• The Scientific Basis for Estimating Air Emissions from Animal Feeding Operations: Interim Report
• Air Emissions from Animal Feeding Operations: Current Knowledge, Future Needs
• The Significance of Ammonia to Coastal and Estuarine Areas

Journal Articles

Newsletter Articles

Other Links

• Section 3 Outdoor Air Quality (MWPS-18)