Agricultural wastes.
D000383:Agriculture; D000693:Anaerobiosis; D000818:Animals; D002417:Cattle; D002645:Chickens; D005069:Evaluation Studies as Topic; D005308:Fertilizers; D007220:Industrial Waste; D012037:Refuse Disposal; D012498:Sanitary Engineering; D014871:Water Microbiology; D014876:Water Pollution; D014877:Water Pollution, Chemical
D005308:Fertilizers; D007220:Industrial Waste