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The survey results indicated that almost 80% of the producers utilized deep pits, which are concrete storage structures that collect the manure below the hog barn. "Deep pits reduce odors by completely containing manure so it can be fully utilized for crop nutrients," said Dwaine Bundy, Iowa State University Agricultural Engineer. Producers began constructing hog barns with concrete pits in the 1970's. "This housing systems is widely used today not only for improved manure management, but also because the system allows the producers to control the temperature inside the structure, keeping the animals warm or cool, clean and comfortable in Iowa's extreme weather," said Bundy.

The survey also showed that 75% of the respondents apply their livestock manure through an injection system, which allows the producer to incorporate the liquid approximately 4-6 inches into the soil. "This method drastically reduces odor by removing the chance of wind and weather affecting the application, preserving the nutrients for crop growth," said Bundy.

Communication, neighbor relations, upkeep of facility, landscaping and timing of application also were expressed as important factors to managing odor.

"Producers are doing a tremendous job of reducing odors on their farms since adapting these technologies," said Steve Kerns, Chair of the Iowa Pork Producers Association Environmental Committee. "It shows their commitment to protecting the air and water and simply being good neighbors."

Source: Iowa Pork Producers Association - October 2003