Checking Corn Populations

Author:  Comments Off on Checking Corn Populations

The warm weather bursts we are having in between rains have helped get what corn that is planted out of the ground much quicker than usual for April and that has reduced our replant situations.  And our corn is much too small to be a target for damaging wind and hail.  I know that folks are checking corn stands in fields that have gone through several rains between planting and emergence.  The following table lists the row lengths to count plants for a population estimate in 1/1000th of an acre.  I usually make at least 5 counts in areas that seem to represent field conditions to get a good average.  A population of 24,000 plants per acre that is pretty uniform is a keeper at this point.  We have also kept fields planted on 38″ rows that had populations closer to 22,000 plants per acre that were on upland soils prone to pollination problems in dry years where corn was planted in May. 

Row Width(inches) Row Length equal to 1/1000th of acre
15 34 feet 10 inches
20 26 feet 2 inches
30 17 feet 5 inches
36 14 feet 6 inches
38 13 feet 9 inches