Calculating Growing Degree Units for Corn Seed
Growing Degree Units (GDU) are calculated using the following formula. The daily high temperature is capped at 86 degrees Fahrenheit and the daily low is capped at 50 degrees. These limits have been established because growth is assumed to slow or stop when these temperature caps are exceeded. There are many sources that provide calculated GDUs for you to track. Talk to your local Kussmaul Sales Manager or Dealer to help you track your GDUs for the entire growing season.
GDUs = ((Daily high temperature + Daily low temperature)/2) – 50
* Source: Purdue University Corn & Soybean Field Guide 2008 Edition