Like many corn and soybean farmers, Kaden Sweeney watched the U.S.-Iran war causing upheaval in global markets last spring, sending prices for critical farm inputs like diesel and fertilizer soaring and casting uncertainty over whether and how this year’s planting season would play out. Ultimately, Sweeney did what he usually does: plant roughly half his acreage to corn and the other half to soybeans: the tried-and-true 50-50 rotation.