Test weight of corn determines the weight of a bushel volume (1.244 cu ft) of grain. Test weights determined on dry (15.5% moisture) corn can indicate whether the grain crop reached full maturity. Low test weights indicate immaturity. If bushel test weight of mature corn is determined at harvest, when grain moistures are greater than 15.5 percent, test weights will be biased downward. In other words, as corn grain dries, test weight goes up. The adjustments in test weights do not apply if (a) grain contains more than 10 percent broken kernals, (b) grain was damaged by drought and disease, (c) grain was harvested when immature, or (d) grain was dried at air temperatures of 180°F or higher