Independence Day has come and gone, and scant acres of corn in most of Iowa have reached that old, outdated saw of knee high by the fourth of July. On my weekend trip to western Iowa, I saw corn ranging from V2 to VT! Admittedly, very little acreage was at either extreme, but it illustrates the continuing range of crop conditions that we will deal with through and after harvest this year.
Iowa State University
Pope, Richard O., "Knee High by When?" (2008). Integrated Crop Management News. 808.
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