7 CFR §810.1005

1. (a)Bleached oats. Oats that in whole or in part, have been treated with sulfurous acid or any other bleaching agent.
2. (b)Bright oats. Oats, except bleached oats, that are of good natural color.
3. (c)Ergoty oats. Oats that contain more than 0.10 percent ergot.
4. (d)Extra-heavy oats. Oats that have a test weight per bushel of 40 pounds or more.
5. (e)Garlicky oats. Oats that contain 4 or more green garlic bulblets or an equivalent quantity of dry or partly dry bulblets in 500 grams of oats.
6. (f)Heavy oats. Oats that have a test weight per bushel of 38 pounds or more but less than 40 pounds.
7. (g)Smutty oats. Oats that have kernels covered with smut spores to give a smutty appearance in mass, or that contain more than 0.2 percent of smut balls.
8. (h)Thin oats. Oats that contain more than 20.0 percent of oats and other matter, except fine seeds, that pass through a 0.064 × 3/8 oblong-hole sieve but remain on top of a 5/64 triangular-hole sieve after sieving according to procedures prescribed in FGIS instructions.