Of course, we have to take this study with a grain of salt. No doubt the researchers were simply listing some of the contributing factors to what they see as a disturbing uptick in rickets diagnoses.

That's only part of the story, of course: meat and milk make up about 15 per cent of calories eaten by humans, so we would need to eat more grain to compensate for their loss.

Of course, combines come complete with a video screen that has global positioning information, yield totals, and moisture content of the grain.