7 CFR 810.1804: Grades and grade requirements for sunflower seed.

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

Damaged Sunflower Seed Dehulled seed (percent)

Heat Damaged (percent) Total (Percent)

U.S. No. 1 25.0 0.5 5.0 5.0

U.S. No. 2 25.0 1.0 10.0 5.0

U.S. Sample grade—

U.S. Sample grade is sunflower seed that:

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

(b) Contains 8 or more stones which have an aggregate weight in excess of 0.20 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), 10 or more rodent pellets, bird droppings, or equivalent quantity of other animal filth per 600 grams of sunflower seed; or

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

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