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Corn and Soybean Update: After last week’s storms, some have wondered how long their germinated seed and emerged plants could survive under water. There isn’t a great deal of research regarding germinated corn hybrid seed. From some corn inbred research, it is not expected that germinated seed can survive in flooded conditions for more than four days. Within 48 hours, soil oxygen becomes depleted and crusted soils from heavy rains can lead to reduced emergence. A two-day flooding event after soybean seed germination and imbibition (water uptake) reduced soybean stands from 20-43 percent in research conducted in the early 2000s.
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