When nitrogen (N) deficiencies occur early and mid-season, corn leaves on the lower part of the plant begin to turn yellow prematurely starting from the leaf tip and progressing towards the stalk. Lower leaves will be affected first as N is mobile and will be reallocated to the upper leaves. The yellow color will turn brown followed by death of lower leaves, leading to a condition known as firing.
How well did your nitrogen (N) program work in this "unusual"? year? Generally we have had higher rainfall than normal (but not everywhere) and we have been cooler than normal, all of which can have several consequences.
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