When it comes to nutrients timing is critical. There are three windows of opportunity that are very important for corn. The first is V5-V6 (V6 determines how many rows per ear). The second is just before tassel (V10 determines length of corn ear). Third is at R2 (R2 determines test weight and kernel fill). Brett says, "don't let your corn have a bad day". Contact Brett if you have more questions. 307-575-0325