On Andy Corriher’s farm in North Carolina, planting and preparations are underway for his corn and soybean crops — but fertiliser costs have surged on war in the Middle East, and orders he placed weeks ago have yet to arrive. The 47-year-old is among US farmers facing a double whammy of soaring fertiliser and diesel prices after US-Israeli strikes on Iran triggered Tehran’s blockage of the Strait of Hormuz, a critical waterway for such shipments. “This time of year is when the majority of fer...