Each year in areas where corn (Zea mays L.) is grown, biotic and abiotic (living and nonliving) factors can prevent timely planting or reduce stands so severely that yield potential may be reduced to unsatisfactory levels. Once these threats are realized, producers must make quick and accurate decisions. Careful evaluation of the current situation in terms of projected yields and profitability is crucial. If projected profitability is not acceptable, replant options should be considered.