Response to weather/flooding/replant concern
Response to weather/flooding/replant concern - following Region 1 teleconference.
May 28, 2013.
Crop under water.
- corn – 2-3 days.
- Soybean -1-2 days.
- Seed that has not germinated – a longer time frame– can be several days.
- Concerns of dirt in the whorl, root rot, delayed disease development – are valid concerns but it is too early to tell.
- Plant/replant corn until ~June 5.
- Yield potential and grain moisture content at harvest becomes too large of concern after that. Late planting/replanting results from the 2008 season contradicted that recommendation.
- hybrid maturity – use a 95-100 day maturity for planting.
- Plant population – reduce slightly.
- soybean becomes a better replant option after ~June 5.
- Yield potential on soybean still very good until mid/late June.
- Stay with adapted varieties until June 15-20. The reason to stay with adapted varieties is better yield potential than a variety with an earlier maturity rating.
- Plant population – use the same planting population as the original planting.
- Nitrogen losses have occurred. It is difficult to know how much.
- Consider late spring nitrogen test http://soiltesting.agron.iastate.edu/LSN.pdf
- SureStart/TripleFLEX biggest concern if replanting soybean following land that has had either of these two products.
- Field with Harness/Surpass/Keystone should not be a problem – if soybeans are replanted following these products.
- Low rates of atrazine - <0.5 lb./a – should not be a problem with soybean replanting.
- There may be more risk from planting soybean following Corvus, Balance Flexx or Prequel.
- soybean replanting - http://www.extension.iastate.edu/Publications/PM1851.pdf
- flooded soybean- http://www.extension.iastate.edu/Publications/PM1851.pdf
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