Method and apparatus for presenting grain for nir spectography examination

An apparatus for presenting grain for NIR spectography examination, comprising,

• an overhead grain compartment having a lower grain discharge port,
• a closeable valve on the discharge port,
• a downwardly extending grain channel located below the discharge port and adapted to receive grain from the overhead compartment when the valve is open,
• the channel including a sloping presentation surface,
• an adjustable baffle in the channel adapted to direct a curtain of grain of uniform thickness from the overhead compartment into engagement with the sloping presentation surface,
• the channel having a discharge opening at a lower end,
• and an NIR spectography apparatus associated with the presentation surface and including an optic system to direct light at a substantial right angle with respect to the direction of flow of the curtain of grain over the presentation surface for analysis of the microconstituents within the grain comprising the curtain of grain.