7 CFR 810.1204: Grades and grade requirements for rye.

Grade Minimum test weight per bushel (pounds) Maximum limits of—

Foreign material Damaged kernels Thin Rye (percent)

Foreign matter other than wheat (percent) Total (percent) Heat damaged (percent) Total (percent)

U.S. No. 1 56.0 1.0 3.0 0.2 2.0 10.0

U.S. No. 2 54.0 2.0 6.0 0.2 4.0 15.0

U.S. No. 3 52.0 4.0 10.0 0.5 7.0 25.0

U.S. No. 4 49.0 6.0 10.0 3.0 15.0

U.S. Sample grade—

U.S. Sample grade is rye that:

(a) Does not meet the requirements for the grades U.S. Nos. 1, 2, 3, or 4; or

(b) Contains 8 or more stones or any numbers of stones which have an aggregate weight in excess of 0.2 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), 2 or more rodent pellets, bird droppings, or equivalent quantity of other animal filth per 11⁄8 to 11⁄4 quarts of rye; or

(c) Has a musty, sour, or commercially objectionable foreign odor (except smut or garlic odor); or

(d) Is heating or otherwise of distinctly low quality.