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 Defective lentils, % (total = weevil‐damaged + heat damaged + damaged + splits); “US #1” ≤ 2.0%, “US #2” ≤ 3.5%, and “US #3” > 5.0%

 Foreign material, % total and stones (“US #1” ≤ 0.2%, “US #2” < 0.5%, and “US #3” > 0.5)

 Skinned lentils (≥ 3/4 seed coat missing)

 Contrasting lentils – both size and color deviations from the predominant type (“US #1” ≤ 2.0%, “US #2” < 4.0%, and “US #3” > 4.0%). Lots with greater than 4.0% are subject to a limiting rule, which states that the lot may not be graded greater than “US #3”;

 Minimum requirements for color use the following terminology: “US #1” = good, “US #2” = fair, “US #3” = poor.

Further, special grades for lentils may be designated by two size classes based on round hole sieve classification tolerances as follows: large lentils (3.0% <15/64 inch) and small lentils (95% > 15/64 inch, 80% > 12/64 inch, 3.0% < 9/64 inch). This size grade terminology is designated with the US grade (USDA 2017b).

The integrity of bean cultivars depends on bean seed propagation being secure and “true to type.” Without a secure seed supply, the identity of a commercial cultivar will likely “drift” and as such, the genetic and phenotypic traits will differ over time (generations). Strict quality control must be maintained to secure bean genetics in commercial seed production. This process is conducted under governmental (national/federal, state/provincial) and/or private sector certification programs.