Climate Change: Wheat yields to plummet with global warming – Experts Wheat yields may drop by seven per cent for every degree Celsius rise in temperature as a result of global warming experts warned in a study published in Berlin on Wednesday. “Over the coming years, wheat production will be challenged by an increasingly variable climate with multiple studies indicating a 7 per cent decline in yield for each degree increase in temperature.’’ This is according to the strategy paper produced by the Wheat Initiative, a group of public and private entities...