Pollution control--feedlot operations.
D000220:Adaptation, Biological; D000383:Agriculture; D000821:Animal Feed; D000818:Animals; D000829:Animals, Domestic / Q000254:growth & development*; D002417:Cattle; D002980:Climate; D004777:Environment; D008722:Methods; D012722:Sewage; D013552:Swine; D014481:United States; D014876:Water Pollution / Q000517:prevention & control*
D012722:Sewage