By Angie Rieck-Hinz
I recently attended the Iowa State University Weed Science Field Day at the Curtiss Farm outside of Ames. During this field day, I noticed an area of shorter, yellow corn as compared to the surrounding corn (Figures 1 and 2). My initial thoughts were 1) this area was a wet area and probably had experienced significant denitrification, or 2) perhaps they missed applying nitrogen in this research block.
When I asked the weed science program manager, who responsible for the weed science research program, he told me all the weed science plots received the same amount of nitrogen, it was all applied at the same time, and it was all the same corn hybrid.
Source : iastate.edu