Testing Analysis Methods
The corn samples were sent directly from the country grain elevators to the Illinois Crop Improvement Association Identity Preserved Grain laboratory (IPGL) in Champaign, Illinois. Upon arrival at IPGL, the samples were split into two subsamples using a Boerner divider. One subsample was delivered to the Champaign-Danville Grain Inspection (CDGI) for grading. CDGI is the official grain inspection service provider for east-central Illinois as designated by the Grain Inspection, Packers and Stockyards Administration (GIPSA). The grade testing procedures were in accordance with GIPSA’s Federal Grain Inspection Service (FGIS) Grain Inspection Handbook, and are described in the following section. The other subsample was dried to approximately 15% moisture and analyzed at IPGL for the chemical composition and other physical factors following either industry norms or well-established procedures in practice for many years. IPGL has received accreditation under the ISO/IEC 17025:2005 International Standard.