Cooler-than-normal weather continued as September dawned in Iowa. During the first week of September, Iowa lost about an additional 25 degree days to normal. This isn't great, but then not a crisis either. Open, sunny days and moderately warm temperatures are key to maturing and drying crops in the fields.
Iowa State University
Pope, Richard O., "Degree Days - Will it be Septembrrrrrr??" (2009). Integrated Crop Management News. 544.
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