Wisconsin Historical Five-Year Summary Maps Phosphorus 1995-1999 (detailed) 2000-2004 (detailed) 2005-2009 (detailed) 1974-2009 Potassium 1995-1999 (detailed) 2000-2004 (detailed) 2005-2009 (detailed) 1974-2009 Soil pH 1995-1999 (detailed) 2000-2004 (detailed) 2005-2009 (detailed) 1974-2009 Organic Matter % 1995-1999 (detailed) 2000-2004 (detailed) 2005-2009 (detailed) 1974-2009
