Ontario Corn Replant Decision Aid Tool

Posted on by Ben Rosser in Corn

The Ontario corn replant decision aid can be accessed by clicking the icon below.

(this is the same tool previously posted on gocorn.net)



Simple Summary

  • The corn replant decision aid tool uses Ontario corn planting date and population data to provide guidance around the economics of corn replant decisions


Ontario Corn Replant Decision Aid Tool

If you’ve had stand issues following planting corn, you’ve maybe wondered whether the field should be left as-is or if there is an economic benefit to terminating and replanting. A lower population may reduce yield potential of the original stand, but it also costs money to terminate and replant. A later planting date also likely means lower yield potential and higher drying costs.

Figure 1. Screenshot of Ontario corn replant decision aid tool.



Using the Tool

The Ontario corn replant decision aid tool leverages Ontario corn planting date and population data to provide guidance around the economics of replant decisions (Fig. 1). Because yield losses and drying expenses from late planting vary by region, results are tailored to the CHU of the hybrids being grown. The decision aid:

  1. Weighs the estimated income from leaving the original stand
    • estimated yield for original planting date and compromised population relative to yield expectation for the field
    • price per bushel after expected drying costs for original planting
  1. Against the estimated income from replanting
    • estimated yield for replant date and population relative to yield expectation for the field
    • price per bushel after expected drying costs for replant corn
  1. Less costs for replanting
    • termination of original stand
    • cost of seed and field operations to replant
    • credit for any crop insurance replant benefits


Output

The tool provides estimated yield and profit losses associated with

  • stand reductions for the original planting date
  • delayed planting associated with the replant corn

Profit difference ($/ac) for a replant is provided as well as minimum populations that would make a replant profitable.

Guidance is derived from Ontario planting date and population trials conducted across 4 years (2006-2009) at 3 locations (Elora, Exeter, Ridgetown) per year. Response data is from 8 adapted hybrids per location per year.