The later planting this season is also generating some further discussion of yield potential, particularly for corn. “As learned again last year, corn yields are mostly determined by summer weather conditions,” Good said. “However, agronomic research clearly indicates that planting date, everything else being equal, can have some influence on yield outcome. In particular, there is an increasingly large yield penalty associated with corn planted late. That same research suggests that maximum yield potential is associated with corn planted in a fairly large window of time. For much of the Midwest, that optimum planting window is from about mid-April through early May with increasingly large yield penalties after mid-May.
“At this juncture, the potential for U.S. average corn and soybean yields near trend value in 2013 are still in place,” Good concluded. “Still, the likelihood of some planting delays, along with lingering drought conditions in western areas, provides the basis for considerable yield uncertainty for corn in 2013. If these conditions persist, new-crop corn futures could regain some of the losses occurred since late 2012. For those with crop revenue insurance, pricing opportunities for both corn and soybeans should probably be judged in context of the spring crop insurance prices, with prices well above those levels representing sales opportunities,” he said.