Purity

(1) The name or names of the kind, type, or varieties, and the percentage or percentages thereof. (2) The percentage of other agricultural seed or crop seed; the percentage of inert matters. (3) The percentage of weed seed, including noxious weed seed, and the names of the noxious weed seed and the rate of occurrence of each. Seed purity is the percentage of the desired species in relation to the total quantity, including other species, weed seed, and foreign matter. [Source: USDA National Plant Materials Manual]