1659-1321 1659-1321 S1659-13212018000100150 10.15517/ma.v29i1.27293 Costa Rica Costa Rica 00 04 2018 00 04 2018 29 1 150 162

2000 11 2 2 79-84 AOAC (Association of Official Analytical Chemistry) 2000 17 AOAC (Association of Official Analytical Chemistry) 2002 19 2004 27 887-95 1999 22 303-13 1998 1999 52 661-5 2008 6 2004 15 31-7 1999 239-54 2007 7 10-7 1992 228-30 1994 77 230-6 1957 2 1993 85 341-7 2001 12 181-7 2004 15 77-80 2001 24 1269-90 1999 96 1175-80 2009 41 25 1970 1985 68 2615-20 IMN (Instituto Meteorológico Nacional) 2010 2007 23 81-90 1995 90 1198-203 2009 49 1116-24 2008 3 822-8 2006 76 53-63 2006 165-73 1997 2002 12 578-80 1999 23 2 2 165-71 SAS 1985 Soil Survey Staff 2014 12 1979 2004 64 156-62 2007 135 329-45 2004 28 1 1 17-25 2009 41 22-4 2005 16 215-23 2009 20 391-8 1982 2008