Design and performance of an electronic seed counter

A general purpose electronic seed counter which counts seeds during free fall is described. Counting errors of less than 0.4% at counting speeds of 400 to 1,180 seeds/min were obtained for seeds of nine different species ranging in size from corn (Zea mays L.) to trefoil (Lotus corniculatus L.). Under some conditions, the seed dispenser, a vibratory small parts feeder, segregated wheat kernels (Triticum aestivum L.) into weight classes dispensing heavier kernels first into the counting system.