Hog farming trends lead to environmental policy changes for manure management.
Hog farmers have been dealing with more manure on less land due to larger operations. To manage this, they are using better techniques like nutrient management plans. Changes in laws and regulations have also influenced how hog manure is handled. The study looked at data from 1998 to 2009 and found that environmental policies have led to more conservation-friendly manure management practices. Practices like controlled manure application rates have become more common over time.