0120-9965 0120-9965 S0120-99652016000300309 10.15446/agron.colomb.v34n3.60350 Colombia Colombia 00 12 2016 00 12 2016 34 3 309 316

2007 2008 a 2008 b 2008 c 1983 2 6 6 335-50 2007 49 4 4 423-35 2001 1992 18 4 4 675-89 1999 45 4 4 293-6 1992 187 1 1 142-51 EPA 2004 2011 30 2 2 168-72 ICA 2003 ICA 2006 ICA 2008 ICA 2012 2013 80 2 2 159-67 1996 37 1 1 49-59 2013 90 1 1 37-43 1985 313 6005 6005 810-2 1993 1997 1993 1988 70 1 1 25-37