'''Manure''' is material—usually some kind of farm waste material, often consisting the feces of animals—used as agricultural fertilizer. It must be used with care to prevent the spread of [[bacteria]]l infection.
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Human manure, known as "night soil," was a traditional form of fertilizer in China and Japan. In the United States, heavily treated products derived from municipal sewage are sold for use as fertilizer, one example being Milorganite.<ref>[http://www.milorganite.com/about/history.cfm Milorganite: Our History]</ref>
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''Green manure'' consists of crops which are deliberately planted for the purpose of being plowed under later in order to improve the soil.