ManureAnimal HusbandryAgricultureFertilizersDairyingSwineAnimals, DomesticSoil MicrobiologySoilCattleWaste ManagementAnimal FeedEnvironmental PollutionHousing, AnimalAmmoniaRefuse DisposalFecesOdorsLivestockLettuceNitrogenCrops, AgriculturalCattle DiseasesNitrogen CompoundsEscherichia coli O157Agricultural Workers' DiseasesAnimal Nutritional Physiological Phenomena