As of Sept. 27, 2009, we are close to winning the race between early frost and crop maturation across Iowa. The average date of first killing frost ranges from around Oct. 5 in central Iowa; about a week earlier to the north and west ,and a week later in southeast Iowa. It appears now that the 2009 first killing frost will occur at least at the average, and hopefully a bit later.
Iowa State University
Pope, Richard O., "Degree Days - The Finish Line Looms" (2009). Integrated Crop Management News. 538.
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