Noxious weeds

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1. Weeds categorized by law as objectionable in a seed lot for commercial sale.

slide32.JPG

The left most pile of seed is contaminated grain seed with weed seed mixed in the middle picture is the weed seed separated the right most picture is the pile of seed with no contamination due to weed seed

Source:http://www.ilri.org/html/trainingMat/Seed/sld_show/slide32.htm