TY - JOUR T1 - Quantification of leaf greenness and leaf spectral profile in plant diagnosis using an optical scanner JO - Ciência e Agrotecnologia A1 - Doi, Ryoichi SN - 1413-7054 UL - 10.1590/S1413-70542012000300006 VL - 36 Y1 - 2012 PB - Brazil ER -