With the aid of LED technology and VIS (Visible Light Spectrometry) / NIR (near-infrared) sensors seed corn is graded by the ZEA food sorting machine. The sorting criteria for seed corn are: husk, size and defects such as gross defects, foreign materials, color and shape. For more information on corncobs sorting, please visit http://tomra.com/en/solutions-and-products/sorting-solutions/food/your-produce/vegetables/corn.