“Knee high by the fourth of July!” Some of us grew up with that old saying which either foreshadowed disaster or forecast bumper yields. If corn was knee high by the fourth, most thought it would mature before the first fall frost. That was good news! As we look back, the statement perhaps was valid back when the first target corn planting date was mid-May.
Iowa State University
Elmore, Roger W.; Al-Kaisi, Mahdi; and Taylor, S. Elwynn, "Short Corn and Variable Growth—2013" (2013). Integrated Crop Management News. 48.
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