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810.2204 Grades and Grade Requirements for Wheat.

(a) Grades and grade requirements for all classes of wheat, except Mixed wheat.
Reprinted from "United States Standards for Wheat-Subpart M"


WHEAT GRADES AND GRADE REQUIREMENTS
GRADING FACTORS GRADE GRADE GRADE GRADE GRADE
  1 2 3 4 5
Test Weight (lbs/bu). (Minimum pound limits:          
HRS 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
           
Defects (Maximum percent limits):          
Damaged kernels - Heat (part of total) 0.2 0.2 0.5 1.0 3.0
Damaged kernels - Total 2.0 4.0 7.0 10.0 15.0
Foreign materials 0.4 0.7 1.3 3.0 5.0
Shrunken and broken kernels 3.0 5.0 8.0 12.0 20.0
Total1/ 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
Total3/ 3.0 5.0 10.0 10.0 10.0
Stones 0.1 0.1 0.1 0.1 0.1
           
Other material (1000 gram sample) (Maximum count limits):          
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 substance 3 3 3 3 3
Total4/ 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, 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, and shrunken and broken kernels.
2/ Unclassed wheat of any grade may contain not more than 10.0% 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.