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Corn Moisture Meter Comparisons to the Air Oven in Illinois

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  036003,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.15044) @2003
Authors:   Mukti Singh, Marvin R. Paulsen, Sidney A. Colbrook
Keywords:   Corn, moisture, moisture meters, dielectric, oven drying

The objective of this study was to compare moisture meter readings to the 103C 72-hr air oven reference method for naturally wet corn during the Fall of 2002. Each sample was tested by the Illinois Department of Agriculture in triplicate in 12 moisture meters and in the air oven. Moisture meters tested included: the Dickey-john GAC 2100, GAC 2000, and GAC II; Motomco 919, 919E, and 919ES; Steinlite SL 95, SB 900, SS 250, RC, RCT; and Burrows 700. Compared to the oven, most of the meters performed within the acceptable limits up to approximately 25% moisture content on combine and hand-shelled corn. Above 25% moisture and with hand-shelled corn, many of the moisture meters tended to read lower than the air oven. The low readings were believed to be caused by hand-shelled samples of corn. Based on only one crop year with predominately handshelled samples no recommendations for changes in moisture meter calibrations were made.

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