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Producers and researchers alike have concerned themselves with the possibility that seed size and shape may affect corn yield. As early as 1937, Dr. Kiesselbach (University of Nebraska) compared across several years, large (29.2 g or 1.03 oz/100 seed) and small (15.8 g or 0.56 oz/100 seed) seed of open-pollinated corn. He concluded, "There may be considerable difference in seed size without greatly affecting the yield of corn under ordinary planting conditions."