A shipping container is taken off a truck at the Port of Virginia in Norfolk, Va., Aug. 13, 2024. The cost of diesel fuel, used in farm machinery, trucks and other heavy equipment, has surged because of the war in Iran and Ukrainian attacks on Russian refineries. (Kristen Zeis/The New York Times) By ARUNI SONI When Randy Madden saw the way diesel prices were rising, he decided to delay purchasing the fuel that powers his 3,000-acre farm in Iowa. Except prices are at around the same level as…
