It’s normal to have some corn producers express concern about
Restricted root growth induced by compacted soils and compacted furrow
Young corn plants that turn purple usually grow out of the symptoms after about the six-leaf stage. When the weather warms up and rapid growth resumes, sugars are metabolized normally and plants attain their normal green color.
Research on understanding purple corn has shown the anthocyanin pigment is produced only on the surface layer of cells and does not affect the chlorophyll content in the leaf. Therefore, early season purple coloration does not generally impact corn yield. Furthermore, there are some genetic differences in the predisposition of corn hybrids to purple coloration.
Michigan State University Extension recommends farmers scout early season corn fields for compacted soil, nutrient deficiency symptoms, pesticide misapplications, root injury or deformities, irregular planting
Source: George Silva, Michigan State University
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