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.
Bonifacio-Maghirang, E., Paulsen, M. R., Hill, L. D., Bender, K. L. (1997) Single kernel moisture variation and fungal growth of blended corn. Applied Engineering in Agriculture 13(1): 81-89.
'Single kernel moisture variation and fungal growth of blended corn. ' () 13 Applied Engineering in Agriculture : 81 -89.
Code of Federal Regulations (2005) Paragraph 800.61(b)(3) of Regulations under the United States Grain Standards Act. Available at:
Funk, D. B., Midden, W. E. (1978) Analysis Instrument. U. S. Patent No. 4,121,151: Dickey-John Corporation.
Gillay, B., Funk, D. B. (2006) Effects of moisture distribution on measurement of moisture content of dried corn. Acta Alimentaria (forthcoming).
'Effects of moisture distribution on measurement of moisture content of dried corn ' () Acta Alimentaria .
Hewlett-Packard (1996) HP 4285A Precision LCR Meter Operation Manual. Japan: Hewlett-Packard.
National Agricultural Statistics Service (2005) USDA Grain Stocks Historical Track Records, Report No. Gr St 10 (05), Available at:
Nelson, S. O., Lawrence, K. C. (1990) Kernel moisture variation on the ear in yellow-dent field corn. ASAE Paper No. 90-6053. St. Joseph, Mich.: ASAE.
Kernel moisture variation on the ear in yellow-dent field corn. ASAE Paper No. 90-6053 , ().
Nelson, Stuart O. (1992) Correlating dielectric properties of solids and particulate samples through mixture relationships. Trans. ASAE 35(2): 625-629.
'Correlating dielectric properties of solids and particulate samples through mixture relationships. ' () 35 Trans. ASAE : 625 -629.
Wilcke, B. (2005): Drying, handling, and storing wet, immature, and frost-damaged corn. Minnesota/Wisconsin Engineering Notes. University of Minnesota. Available at: