As blue corn advances in maturity, the kernels will be white until the drydown period. At this time, the blue color appears and darkens as drydown progresses. As kernel moisture declines, lodging increases depending on plant height, amount of stalk rot present, and the incidence of wind. Combine cylinder speeds must be reduced with special efforts to minimize seed cracking. Seedcoat cracking interferes with its removal during processing.
Commercial operations use popcorn cleaners and baggers for their crops.
Buyers generally require delivered clean grain that is free of disease, insect, and foreign matter. The Northern flint corns. E.G. Anderson, and R. Tuchaweng, Jr. 1952. Observation on three varieties of Hopi Maize. Carter, G.F. and E. Anderson.