Reuters: Tracking the amount of US corn and soybeans lost to the worst flooding in 15 years for the US Midwest, one of the world’s key food production areas, will be a daunting task, crop specialists said on Friday. "The key word is uncertainty. We’re getting close to the end of time to replant crops, but that leaves a lot of unknowns," said Bob Nielsen, extension agronomist with Purdue University in Lafayette, Indiana. "How severe is the crop damage in those areas that …