My six-foot-tall father standing in our tallest corn on July 3rd.
Knee-high by the Fourth of July is a common saying in the midwest. It refers to the height of corn. I guess that used to be a decent target for corn in the old days. Corn is planted earlier now.
This is a corn plant showing potassium deficiency. Yellowing on the outside of the lower leaves is the telltale sign. This plant is alongside a gravel road so it probably has more to do with soil compaction and the inability of the corn roots to search out available potassium than an actual potassium deficiency in the soil. The corn looks fine a few rows in.
It’s enlightening that corn shows it’s deficiencies so readily. What if our personal deficiencies were as visible?
Posted by Curiousfarmer 
Curiousfarmer 