Agricultural and Biosystems Engineering
A danger associated with newly filled silos is due to accumulation of nitrogen dioxide. An individual may experience an immediate detrimental reaction to the presence of silo gas. Additionally, an individual may experience reactionary symptoms, sometimes called "Silo filler's disease", due to extended exposure to silage dust or gas.
Durland, Bob, "Silage Gas Can Be Dangerous" (2002). SDSU Extension Extra Archives. 2.