That is especially true of corn.

"Mold will grow at 15 percent moisture if the corn is fairly warm - say, 80 degrees or so," Stroshine said. "It's very slow, but there still can be mold growth there that could eventually compromise your ability to store the corn."

For early harvested corn, Stroshine recommends a stored moisture content of 14.5 percent, or 13 percent if the grain will be stored through next summer. To get corn down to those lower moisture levels rapidly, farmers should use high-temperature cross flow drying.

Farmers who need to dry in the bin can increase the drying rate using a technique called layer drying, Stroshine said. Like the name implies, a farmer will place grain in the bin in layers while continuously drying.

"That first layer will dry faster than normal, and by the time you put your second layer in the bin you will have gotten some field drydown of that grain, which should save some in-bin drying time," he said.

"Another thing to remember is if you don't remove the fine material from the bin before you put grain into it you'll need to core your bin. Fine material tends to concentrate in the center of the bin. To core the bin, open the center well, pull out a load and you should get a lot of those fines out. If your grain is peaked you also should level the top surface, which is very important for good aeration."

Other issues farmers should keep in mind as they harvest and store grain this year include:

• Crop insurance. Crop losses incurred in the field are covered by insurance but post-harvest crop losses are not.

• Grain breakage. "Dry kernels and kernels that have been invaded by fungi in the field will break up more easily, so you'll need to set your combine at the lowest cylinder speed you can to get a decent removal of kernels from the cobs," Stroshine said. "You'll also probably have a lot of foreign material with those kernels — pieces of stalk and cob — that could cause some problems. You might need some kind of cleaning equipment to help you out because I don't think the combine will be able to do it alone."

• Aspergillus ear rot. The hot and dry summer has provided a good environment for the development of this fungus in corn. The fungus produces aflatoxin, a carcinogen that can be harmful or fatal to livestock fed the infected corn. Grain testing can identify infected kernels. Removing fine material and small kernels from the harvested grain can reduce the levels of mycotoxins but not eliminate them altogether.

• Insects. Higher populations of grain-damaging bugs are expected this year with the warmer temperatures and the availability of broken kernels and fine material as food. Insect problems have been reported in grain already in storage.

Additional grain storage tips are available on the Purdue Post Harvest Grain Quality website at http://www.grainquality.org.

General agricultural drought information can be found on the Purdue Extension drought website at http://www.purdue.edu/drought.