While the greatest need for water in corn occurs during the later vegetative stages, the impact of early-season drought stress on corn can cause impacts that last the entire year. Drought conditions in the early season can hamper emergence, causing uneven stands, and can negatively impact ear length, overall leaf area, and root growth and development. Ron Joiner, Pioneer Field Agronomist, discusses causes of drought in this particular field, as well as how different corn hybrids have responded to the stress. Drought stress that occurs between V6 to V8 can impact the eventual yield potential of the plant by reducing: the number of kernel rows on the ear, the number of kernels per row and total leaf area and photosynthetic capacity of the plant.

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