Uniform emergence is one key to maximizing corn yields. To conduct an emergence test, place a colored flag beside each emerged plant in a 20 foot row of your crop. Return every 12 hours and put a different colored flag by any newly emerged plants. Continue to repeat this process with different colored flags until all the plants in the row section have emerged.
This test helps to show how uniformly corn is emerging, which is the first step to achieving a good stand and maximum yields. Uniform emergence typically increases yield results by five to nine percent according to a University of Michigan Study.
Emergence testing also affords you the opportunity to evaluate your current practices for future years.