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Transactions of the ASAE
Evaluation of mechanical damage has always been one of the most elusive problems associated with the harvesting, handling, and marketing of grains. A standard method to describe the quality of grain from the standpoint of physical or mechanical damage has not yet been developed. And without a standard measure, the equipment manufacturer cannot determine when he has developed an improved harvesting machine, the farmer cannot determine when he is harvesting a better quality of grain, and the grain industries cannot determine when they are processing a better quality of product. Hence, there has always been a need to develop a fast and efficient technique for the accurate determination of quality of grain. The desired technique has to be simple so that everyone can use it, and, on the other hand, it has to be a bulk method (for statistically sound results), by which each and every kernel would be equally checked for a consistent evaluation of qualitative, as well as quantitative, damage in the sample. And finally, the result should be presented on a continuous scale because mechanical damage occurs on a continuous scale from hairline cracks and tiny spots of pericarp missing to complete breakage and fines.
American Society of Agricultural Engineers
Chowdhury, Mofazzal H. and Buchele, Wesley F., "Colorimetric Determination of Grain Damage" (1976). Agricultural and Biosystems Engineering Publications. 132.