University researchers and Extension specialist in 11 states are currently evaluating the impact of voluntary environmental management systems (EMS) for agricultural operations. This evaluation is being conducted through a series of studies with a wide variety of agriculture production operators that voluntarily choose to participate and share information on the design and implementation of their EMSs (Harrison, 2002, and Partnership for Livestock Environmental Management Systems, 2004).
Harrison, John; Smith, Dallen; and Toney, Aditya, "Baseline Protocols" (2004). All Current Publications. Paper 403.