If the cornfield approaches 90 percent light interception near silking, yield should be maximized. In areas where temperatures are cooler and days suitable for growing a crop are fewer, narrow rows tend to reach 90 percent light interception at tasseling more frequently than corn in 30-inch rows. Early canopy closure could help with weed competition and earlier shading of the soil to prevent water loss from evaporation. In some environments these factors may help with yield.
For more information on this and other topics related to corn production, contact your state extension corn specialist or your local extension educator/agent.
Here is the link to the corn extension specialists: state extension corn specialist.
