"usda-agricultural-research-service-national-sedimentation-laboratory" . "USDA Agricultural Research Service National Sedimentation Laboratory"^^ . "http://www.ars.usda.gov/main/site_main.htm?modecode=60-60-05-00"^^ . "federal" . . . _:genid1 . _:genid1 . _:genid1 . _:genid1 . _:genid1 .