If you have been watching cornfields in Central Illinois, you may have noticed that the young corn plants have changed colors over the past couple of weeks. In late April, the small corn plants were green in color and two weeks later these same plants are pale yellow-green. On April 26, the 4-inch bare soil temperature was averaging 65°F. On May 12, the temperature was 49°F.
A recent article by Mike Stanton, soybean Extension educator at Michigan State University, does a nice job of discussing the possible effects of sub-freezing temperatures on early-planted soybeans. If the soybeans have not emerged, there will be not be damage from these low temperatures since the growing point is still below ground.
Stored grain should be kept at or near 35°F according to the experts. But over the past month in Central Illinois, the average daily temperature has varied 44°F – from a high daily average of 52° F to a low of 8°F.
Moisture in a filled grain bin moves from the warmed grain near the outside wall to the cooler grain in the center.