Proceedings of SPIE
Agricultural facilities are the source of many types of particles and gases that can exhibit an influence on air quality. Emissions potentially impacting air quality from agricultural sources have become a concern for regulatory agencies such as the United States Department of Agriculture (USDA) and the Environmental Protection Agency (EPA). Particle mass concentration influences from agricultural sources can include both primary particles (direct emissions such as dust) and secondary particles (formed from gaseous precursors such as ammonia).
Silva, Philip; Martin, Randal S.; Doshi, Vishal; Moore, Kori; and Erupe, Mark, "Variations in Particle Composition and Size Distributions in and Around a Deep Pit Swine Operation" (2006). Space Dynamics Lab Publications. Paper 118.