The two years 2010 and 1983 have a lot in common so far, at least at Ames, Iowa. I haven’t analyzed other locations, but Ames was not typical of the region either year. This year the growing degree day (GDD) accumulation has climbed from normal in mid-May to about 100 GDD above normal at the last week of June. In 1983 the GDD accumulation was about 200 GDD behind usual by mid-June then it rapidly increased to slightly above normal by mid-August.
Iowa State University
Taylor, S. Elwynn, "Could 2010 Turn out Like 1983?" (2010). Integrated Crop Management News. 400.
The Iowa State University Digital Repository provides access to Integrated Crop Management News for historical purposes only. Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user. Users should make their own assessment of the information and whether it is suitable for their intended purpose. For current information on integrated crop management from Iowa State University Extension and Outreach, please visit https://crops.extension.iastate.edu/.