2301-1548 2301-1548 S2301-15482018000200007 10.31285/agro.22.2.2 Brazil Paraguay Brazil Brazil 00 11 2018 00 11 2018 22 2 7 12

1974 19 6 6 716-23 2007 2012 30 3 3 353-66 2005 23 4 4 911-4 2014 44 10 10 1732-9 2014 5 2 2 196-204 2012 4 1 1 61-6 1982 17 9 9 1341-8 2013 48 11 11 1426-31 2009 27 2 2 171-5 FAO 2013 1993 2012 30 4 4 708-12 1993 693-708 2010 33 201-10 2009 40 1 1 86-9 1963 3 477-81 2007 31 5 5 1411-5 1995 1971 11 648-50 1984 2014 35 1 1 113-24 1995 25 1 1 205-20 2006 36 6 6 1710-6 2009 27 2 2 255-68 2011 41 11 11 1907-13 2009 R development core team 2015 2012 2008 2nd ed. 507-17 2012 59 5 5 624-9 2014 5 1 1 51-8 2015 19 1 1 21-6 2006 41 6 6 903-9