[Code of Federal Regulations]
[Title 7, Volume 7]
[Revised as of January 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 7CFR810.403]

[Page 609]
 
                          TITLE 7--AGRICULTURE
 
  CHAPTER VIII--GRAIN INSPECTION, PACKERS AND STOCKYARD ADMINISTRATION 
      (FEDERAL GRAIN INSPECTION SERVICE), DEPARTMENT OF AGRICULTURE
 
PART 810--OFFICIAL UNITED STATES STANDARDS FOR GRAIN--Table of Contents
 
               Subpart D--United States Standards for Corn
 
Sec. 810.403  Basis of determination.

    Each determination of class, damaged kernels, heat-damaged kernels, 
waxy corn, flint corn, and flint and dent corn is made on the basis of 
the grain after the removal of the broken corn and foreign material. 
Other determinations not specifically provided for under the general 
provisions are made on the basis of the grain as a whole, except the 
determination of odor is made on either the basis of the grain as a 
whole or the grain when free from broken corn and foreign material.

[52 FR 24418, June 30, 1987; 52 FR 28534, July 31, 1987]

                      Grades and Grade Requirements


Sec. 810.404    Grades and grade requirements for corn.

----------------------------------------------------------------------------------------------------------------
                                                                                     Maximum limits of
                                                                          --------------------------------------
                                                                Minimum         Damaged kernels
                                                              test weight -------------------------- Broken corn
                            Grade                              per bushel      Heat                  and foreign
                                                                (pounds)     damaged       Total       material
                                                                             kernels     (percent)    (percent)
                                                                            (percent)
----------------------------------------------------------------------------------------------------------------
U.S. No. 1..................................................         56.0          0.1          3.0          2.0
U.S. No. 2..................................................         54.0          0.2          5.0          3.0
U.S. No. 3..................................................         52.0          0.5          7.0          4.0
U.S. No. 4..................................................         49.0          1.0         10.0          5.0
U.S. No. 5..................................................         46.0          3.0         15.0          7.0
----------------------------------------------------------------------------------------------------------------
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 stones with 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)or a commonly recognized harmful or toxic 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.

[60 FR 61196, Nov. 29, 1995]

              Special Grades and Special Grade Requirements