Corn - Chapter 17 | Official Grain Grading Guide
Corn on export is graded in accordance with primary grade standards and specifications.
Cracked corn and foreign material (CCFM)
Because breakage occurs during handling at terminal elevators, round down percentages by weight of CCFM to the nearest whole number on all officially sampled and inspected domestic or export shipments from a terminal elevator.
For example, a sample containing 4.7% CCFM by weight is recorded as containing 4.0% CCFM for grading purposes only on officially sampled and inspected shipments from a terminal elevator.
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