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ProCrop |
USDA Market Grades of Shelled Corn
| Minimum | Maximum Limits of-- |
|||
| Grade | Test Weight per bushel | Heat-damaged kernels | Total damaged kernels | Broken corn and foreign material |
| (lbs.) | (%) | (%) | (%) | |
| U.S. No. 1 | 56 | 0.1 | 3 | 2 |
| U.S. No. 2 | 54 | 0.2 | 5 | 3 |
| U.S. No. 3 | 52 | 0.5 | 7 | 4 |
| U.S. No. 4 | 49 | 1.0 | 10 | 5 |
| U.S. No. 5 | 46 | 3.0 | 15 | 7 |
U.S. Sample grade:
U.S. Sample grade is corn that:
a) Does not meet the requirements for the grades U.S. Nos. 1, 2, 3, 4, or 5; or
b) Contains 8 or more stones which have an aggregate weight in excess of 0.1 percent of
the sample weight, 2 or more pieces of glass, 3 or more crotalaria seeds (Crotalaria
spp.), 2 or more castor beans (Ricinus communis L.), 4 or more particles of an unknown
foreign substance(s), 8 or more cockleburs (Xanthium spp.) or similar seeds singly or in
combination, or animal filth in excess of 0.20 percent in 1,000 grams; or
c) Has a musty, sour, or commercially objectionable foreign odor; or
d) Is heating or otherwise of distinctly low quality.
Note: Moisture content is not considered in USDA Grade determinations.
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