1. Corn emerges after the accumulation of about 125 growing degree days (GDDs). Each new leaf takes 80-85 GDDs to emerge. The growing point remains below the soil surface for three to four weeks, protecting this growing point from physical injury, including frost, surface insects or grazing animals.
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    Corn emerges after the accumulation of about 125 growing degree days (GDDs). Each new leaf takes 80-85 GDDs to emerge. The growing point remains below the soil surface for three to four weeks, protecting this growing point from physical injury, including frost, surface insects or grazing animals.
    www.ndsu.edu/agriculture/extension/publications/c…
    If the soil temperature is averaging 50 to 55 F (10-12.8 C) at the time of planting, corn may take three weeks to emerge. Temperatures averaging 60 F (15.6 C), may have emergence in 10 days to 12 days.
    crops.extension.iastate.edu/cropnews/2012/04/ho…
    Corn usually requires 90 to 120 Growing Degree Days (GDD) from planting until emergence. That can take three weeks in soils 50 to 55 degrees F (4-inch depth), or 10 to 12 days in 60-degree F soils, assuming adequate soil moisture and good seed-to-soil contact.
    www.corteva.us/Resources/crop-protection/corn/co…
    4 days after radical grows downward, coleoptile starts to elongate toward the surface. This is what will become the plant. Coleoptile usually breaks the surface of soil 6-10 days after planting. Or up to a month if you’re a super early planter. This is officially emergence.
    www.petersonfarmsseed.com/corn-growth-stages-…
    Lab studies have shown that for most corn hybrids grown in the Midwest, seedling emergence takes about three weeks if the soil temperature is 51 F and it takes about one week if the daily soil temperature holds near 70 F.
    www.farmprogress.com/corn/once-corn-is-planted-…
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    Severe soil crusting or otherwise dense soil surface and cloddy soil surfaces can cause such resistance. A combination of severe sidewall compaction plus press wheel compaction over the furrow can also restrict coleoptile emergence and …

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    2021年5月24日 · Coleoptile usually breaks the surface of soil 6-10 days after planting. Or up to a month if you’re a super early planter. This is officially emergence. Look out for: Temperature: d on’t plant below 50 degrees. Starch …

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