It is September 24 and thankfully no frost to speak of yet. The 2008 season will be one to look back on as a reference for variable weather effects on crops. I last posted degree day data in mid-August. As mentioned in that article, daily degree day accumulations are less critical once corn and soybean progress to reproductive stages, when general water and temperature stresses and solar radiation drive development.
Iowa State University
Pope, Richard O., "Cool and Calm, Now Hopefully We Collect!" (2008). Integrated Crop Management News. 774.
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