0379-3982 0379-3982 S0379-39822017000400028 10.18845/tm.v30i4.3409 Costa Rica Costa Rica 00 12 2017 00 12 2017 30 4 28 39

[1] 2010 vol. 2 45 [2] 2013 [3] 2012 [4] 2001 [5] 2013 [6] 2010 767-93 [7] 2014 7 151-6 [8] Instituto Interamericano de Cooperación para la Agricultura (IICA) 2012 [9] Manual ANKOM XT10 2016 [10] 2015 [11] 2011 [12] 2013 [13] 2016 [14] Manual Hennessy Grading Probe 2016 [15] 2016 [16] 2016 [17] 2012