2550-6722 2550-6722 S2550-67222019000300092 10.37135/chk.002.09.08 Ecuador Ecuador 00 12 2019 00 12 2019 9 92 104

2011 13 2 2 16-22 2010 28 167-83 2004 2015 2012 4 2 2 137-46 EcuRed 2017 1988 2008 99 9 9 1841-6 2000 7 2018 2013 2014 5 4 4 64-74 2010 2012 2015 20 2 2 188-94 2016 Ministerio de Agricultura y Riego 2017 2011 2012 2014 2017 2 47-60 2011 77 3 3 205-17 2013 2013 16 1 1 69-74 2017 2014 2018