When the top surface of the last fill has dried to 15 percent moisture, run the fan during daytime hours only until the corn is dried to 14 percent moisture. Low-temperature layer drying does present harvesting limitations at moisture contents above 24 percent. Several fills are required and you must wait for the last fill to dry before adding another layer. If the cost of field losses are combined with the cost of drying, the least costly drying calls for the initial fill to average about 24 percent moisture. The moisture content of the corn in the field is decreasing while the initial fill dries, and it is often low enough so that the bin can be completely filled with the second filling.
Harvesting usually is completed in about three weeks.
Fill the bin to a depth of 6.0 feet wet corn and run the fan 24 hours a day until the top surface of corn is 15 percent moisture. This takes approximately nine days. Corn now harvested tests 20 percent. Add 8.3 feet of corn and run fan 24 hours a day until top surface of corn is 15 percent. Takes approximately 11 days.