Evaluation of mechanical damage has always been one of the most elusive problems associated with the harvesting, handling, and marketing of corn. Although greatly needed, there is no standard method to describe the quality of corn from the standpoint of physical or mechanical damage.
American Society of Agricultural Engineers
Mofazzal H. Chowdhury and Wesley F. Buchele. "Development of a Numerical Damage Index for Critical Evaluation of Mechanical Damage of Corn" Transactions of the ASAE
Vol. 19 Iss. 3 (1976) p. 428 - 432
Available at: http://works.bepress.com/wesley_buchele/2/