Corn Replant Decisions: A Review
1990
Benson, G. O.
When the final stand of corn (Zea mays L.) achieved from the initial planting date is lower than desired, whether or not to replant becomes an issue. The major decision facing the corn producer is whether the original stand or the replanted stand (often at an optimum stand, but planted at a later than desired date) would be the most profitable. The producer must begin by determining the surviving stand from the original planting, assessing the health of the surviving plants, and arriving at a yield expectation. This yield expectation is then compared with that for a full stand planted on the potential replant date. In this review, examples from three major Corn Belt states are used to illustrate the planting date-stand relationships basic to such an analysis. The yield penalty for both late planting and low plant stands are greater for the northern Corn Belt. In absence of data for a specific location and set of management parameters, the planting date-stand relationships given for these three states can serve as a starting point. Factors such as replant costs, stand uniformity, hybrid, seed availability, risk of getting a stand from a replant, seasonal differences, replant crop choice, and pest management issues can all influence the replant decision.
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