"agricultural-research-service-grassland-soil-water-research-laboratory" . "US Department of Agriculture Grassland, Soil, and Water Research Laboratory"^^ . "http://www.ars.usda.gov/main/site_main.htm?modecode=30-98-05-00"^^ . "federal" . . . _:genid1 . _:genid1 . _:genid1 . _:genid1 . _:genid1 . _:genid2 . _:genid2 . _:genid2 . _:genid2 . _:genid2 .