0187-5779 0187-5779 S0187-57792020000100217 10.28940/terra.v38i1.718 Ecuador Ecuador Ecuador Mexico 00 03 2020 00 03 2020 38 1 217 231

2017 16 54-65 2004 20 14-22 2008 25 74-100 FAO 2013 2011 24 76-8 2006 90 11-3 1962 2 176-7 2017 106 18-26 2018 10 120‑136 2009 1 1-25 2017 10 9-13 2004 73 3-7 2012 30 51-7 2015 2 151‑161 2017 10 18-24 2014 32 270-2 1996 29 44-6 2008 31 265-72 2005 Florianópolis, SC, Brasil 2001 70 110-6 2008 Texcoco, Estado de México, México 64-72 2002 2011 74 9-32 SSA 2015 2007 2009 4 471-4