A method is disclosed for sorting a plurality of objects including an object that is one of a grain, a nut, a tree nut, or a bean. The plurality objects are conveyed along a guide plate having at least two channels between a first end and a second end of the corresponding channel. The channels have a first aperture provided at a first longitudinal position thereof and an additional aperture provided at a second longitudinal position on the guide plate located downstream of the first aperture. An optical measurement associated with a property of the object of the plurality of objects is conducted when the object passes the first aperture towards the second end with an object measurement unit. The object conveyed on the corresponding channel is ejected with an ejector unit when reaching the second longitudinal position based on the measured property of the object and a timing signal.