El Nino continues to disrupt crop production around the world, and it is not done with Argentina. The country suffered a record crop falloff last season due to the weather phenomenon and now a similar pattern of dryness is impacting two-thirds of the wheat area. The result is a declining wheat yield forecast. Argentina’s wheat yield has been trending downward for many years. The area harvested and total production have slowly been trending upward, but not yield. This is important because yield reflects productivity gain whereas the area harvested simply reflects inputs. It is unclear whether the nation’s recent adoption of GMO wheat will impact the trend, but the trend may have impacted the policy change. Meanwhile, wheat area...