810.2204—Grades and grade requirements for wheat.
| Grading factors | Grades U.S. Nos. | ||||
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | |
| Minimum pound limits of: | |||||
| Test weight per bushel: | |||||
| Hard Red Spring wheat or White Club wheat | 58.0 | 57.0 | 55.0 | 53.0 | 50.0 |
| All other classes and subclasses | 60.0 | 58.0 | 56.0 | 54.0 | 51.0 |
| Maximum percent limits of: | |||||
| Defects: | |||||
| Damaged kernels | |||||
| Heat (part of total) | 0.2 | 0.2 | 0.5 | 1.0 | 3.0 |
| Total | 2.0 | 4.0 | 7.0 | 10.0 | 15.0 |
| Foreign material | 0.4 | 0.7 | 1.3 | 3.0 | 5.0 |
| Shrunken and broken kernels | 3.0 | 5.0 | 8.0 | 12.0 | 20.0 |
| Total 1 | 3.0 | 5.0 | 8.0 | 12.0 | 20.0 |
| Wheat of other classes: 2 | |||||
| Contrasting classes | 1.0 | 2.0 | 3.0 | 10.0 | 10.0 |
| Total 3 | 3.0 | 5.0 | 10.0 | 10.0 | 10.0 |
| Stones | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Maximum count limits of: | |||||
| Other material in one kilogram: | |||||
| Animal filth | 1 | 1 | 1 | 1 | 1 |
| Castor beans | 1 | 1 | 1 | 1 | 1 |
| Crotalaria seeds | 2 | 2 | 2 | 2 | 2 |
| Glass | 0 | 0 | 0 | 0 | 0 |
| Stones | 3 | 3 | 3 | 3 | 3 |
| Unknown foreign substances | 3 | 3 | 3 | 3 | 3 |
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Code of Federal Regulations
509
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| Total 4 | 4 | 4 | 4 | 4 | 4 |
| Insect-damaged kernels in 100 grams | 31 | 31 | 31 | 31 | 31 |
| U.S. Sample grade is Wheat that: | |||||
| (a) Does not meet the requirements for U.S. Nos. 1, 2, 3, 4, or 5; or | |||||
| (b) Has a musty, sour, or commercially objectionable foreign odor (except smut or garlic odor); or | |||||
| (c) Is heating or of distinctly low quality. | |||||
| 1 Includes damaged kernels (total), foreign material, shrunken and broken kernels. | |||||
| 2 Unclassed wheat of any grade may contain not more than 10.0 percent of wheat of other classes. | |||||
| 3 Includes contrasting classes. | |||||
| 4 Includes any combination of animal filth, castor beans, crotalaria seeds, glass, stones, or unknown foreign substance. | |||||
(b) Grades and grade requirements for Mixed wheat.
Mixed wheat is graded according to the U.S. numerical and U.S. Sample grade requirements of the class of wheat that predominates in the mixture, except that the factor wheat of other classes is disregarded.