The eastern Corn Belt struggled early with cool temperatures and wet conditions that delayed planting progress. May has been drier, though, and parts of the western Corn Belt planted crops quickly. However, those areas have now been impacted by too much rain.The current shift from the super strong El Nino to a La Nina is supposed to result in a hot, dry finish to the growing season across the Corn Belt. The degree of the heat and dryness is dependent on how quickly this change in weather patterns occurs. The faster the change, the greater the potential problem and of course the larger the threat to crop yields.In discussions of weather and long-term weather forecasts, it must be noted that this is all far from certain science. There continu...