Agricultural wastes.
D000332:Aerobiosis; D000383:Agriculture; D000821:Animal Feed; D000818:Animals; D002417:Cattle; D003612:Dairying; D005308:Fertilizers; D009584:Nitrogen; D010944:Plants; D012037:Refuse Disposal; D012722:Sewage; D013552:Swine
D005308:Fertilizers; D012722:Sewage; D009584:Nitrogen