The aim of this study was to determine the level and variations in ammonia emissions from buildings and outside yards, with different manure removal systems, for organically raised fattening pigs. It was found that differences in ammonia emissions between farms were probably mainly related to the manure removal system, design of the building and frequency of cleaning of outside yard. The farm with daily scraper cleaning and the farm with the slatted floor system had significantly lower emissions than the farm with bi-weekly manual removal of manure from a solid floor.

For more information the full article can be found at http://www.sciencedirect.com/science/journal/15375110