Rescue N applications prior to tasseling have proven to be effective at recovering yield.
Illinois study¹: 50 pounds/acre of supplemental N applied to an intentionally flooded area was enough to achieve yields similar to the yields in plots where there had not been excess water.
Indiana study²: N applications of 70 lb N/acre applied at V13 resulted in an economic yield response.
Missouri studies: Showed yield can be recovered with N applications as late as tasseling.
¹ (Torbert et al., 1993)
² (Emmert, 2009)