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Know Corn Growth Stages

September 28, 2011
By: Margy Eckelkamp, Director of Content Development, Machinery Pete
 
 

Head to the field with Farm Journal Associate Field Agronomist Missy Bauer as she gives a lesson in how to count collars on early-season corn plants. In Episode 1 of "Corn College TV," Season 2, Bauer explains that knowing corn growth stages provides the foundation of information for scouting season.

"As you are in the field, you need to take note of what growth stage the corn is in. This is important for understanding plant stresses, postemergence herbicide applications and more," she says.
A collar is defined as where the leaf attaches to the stem and there is a light-colored band.
To count collars, the first step is identifying the first true leaf.
"The first true leaf is more of a rounded leaf –- the end is not pointed -– and the leaf is typically shorter," Bauer explains. "Look for that leaf, and that’s the No. 1 collar. Then count up on the stalk."
Learn more in Episode 1 of "Corn College TV," Season 2, as Bauer explains how the number of collars corresponds to growth stages.
 

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