0187-5779 0187-5779 S0187-57792013000500295 Mexico Mexico Mexico 00 12 2013 00 12 2013 31 4 295 303

2007 42 447-51 2003 6 ARSLAND 2006 2003 31 97-107 2008 30 219-29 1999 2011 9 7-12 1991 2003 37 295A-3 1988 2010 40 561-661 2003 15 75-8 2009 25 201-16 IUSS Working Group WRB 2006 128 2003 68 167-82 2001 166 166 197-208 2004 40 409-12 1994 1998 33 826-9 2010 10 428-42 2003 1993 1999 112 133-49 2012 33 184-97 SEMARNAT 2002 SEMARNAT 2007 2002 17 517-68 2002 31 557-63 Soil Survey Division Staff 1993 2010 1-8 2000 2008 96 117-31 2004 644 644 99-101 2002 66 1788-96 2006 22 463-77 2009 181 181 777-94