Below are current recommendations from ISU Extension crop production experts for handling crops in flooded conditions.
Soybean
Is it Time to Switch Soybean Maturity Group Varieties?
Request for Phytophthora of Soybean Plant Samples
Good Seed Supply Available from Most Companies in Iowa
Disease Management in a Flooding Season
Soybean Replanting and Fungicide Treatments
How Late Can Soybeans be Planted?
Effect of Flooding on Emerged Soybeans
Soybean Replant Decisions from Hail Damage and Flooded Fields
Minimize Soybean Yield Loss from Late Planting
Soybean Replant Decisions (PM 1851, pdf)
Forages
Reseeding Flood and Weather-Damaged Forage Crops in Late Summer
Renovating Pastures or Hay Meadows Damaged by Flooding
Hayfield Lodging – Management Concerns and Guidelines
Forage and Cover Crop Considerations for Delayed Planting and Flooded Sites
Rainfall has Affected Hay and Hay-Crop Silage Harvest
Summer Flooding of Hay Fields and Pastures
When is it Too Late Plant Forages?