Some amazing insights from Lizabeth Stahl, CPAg/CCA about the corn harvest for 2014:
Corn reaching maturity about October 1 will normally dry slowly in the field due to cooler ambient temperatures. Standing corn in the field may dry about 1.5 to 3 percentage points per week during October and 1 to 1.5 per week or less during November, assuming normal North Dakota weather conditions. Table 1 below provides field drying rates for corn in Minnesota.
Corn has a moisture content of about 32 percent when it reaches maturity. If it has a moisture content of 32 percent on Oct. 1, it may only dry to about 22 percent moisture by Nov. 1, assuming normal North Dakota climatic conditions. Field drying normally is more economical until mid-October, and mechanical high-temperature drying is normally more economical after that.