Effects of Non-uniform Kernel Moisture Content on Moisture Measurement of Corn

Gillay, Bíborka and Funk, David B. (2005) Effects of Non-uniform Kernel Moisture Content on Moisture Measurement of Corn. Progress in Agricultural Engineering Sciences, 1 (1). pp. 77-93. ISSN 1786-335X

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Abstract

The price paid for corn is usually based on 15.0 or 15.5 percent moisture content. However, corn must be dried below 13 percent moisture to ensure safe storage for a year or more. In the U.S., such stored corn cannot be directly remoistened before selling it, but it can be mixed with moist new-crop corn. Accurate moisture measurement of mixtures of dry and moist corn is important to permit adjustment of blending ratios to maximize profitability, but grain moisture meters are less accurate for mixtures of wet and dry grain. This research evaluated the differences between dielectric-type moisture meter results for mixed and equilibrated corn samples at different moisture levels and different measurement frequencies. Equilibrated grain samples tended to give lower moisture results than recently mixed grain samples - especially in the 1 to 10 MHz region. These differences permitted detection of mixtures by using moisture measurements at two frequencies.

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