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Night soil is a historically used euphemism for human excreta collected from cesspools, privies, pail closets, pit latrines, privy middens, septic tanks, etc. This material was removed from the immediate area, usually at night, by workers employed in this trade. Sometimes it could be transported out of towns and sold on as a fertilizer.
[4] [5] Seaweed fertilizer application to soils can also alter the structure and function of microbial communities. Seaweed aquaculture has the potential to yield ecosystem services by providing a source of nutrition to human communities and a mechanism for improving water quality in natural systems and aquaculture operations. [6] [7] [8]
Wood ash has a high pH, usually around 10 to 12, says Chelsea McKinley, plant health specialist at the U.S. Botanic Garden in Washington, D.C. Most plants prefer a soil pH of around 6.5.
Urea is highly soluble in water and is therefore also very suitable for use in fertilizer solutions (in combination with ammonium nitrate: UAN), e.g., in 'foliar feed' fertilizers. For fertilizer use, granules are preferred over prills because of their narrower particle size distribution, which is an advantage for mechanical application.
Treatment disposal of human excreta can be categorized into three types: fertilizer use, discharge and biogas use. Discharge is the disposal of human excreta to soil, septic tank or water body. [75] In China, with the impact of the long tradition, human excreta is often used as fertilizer for crops. [76]
[21] [23] While animal urine, as from cattle and pigs, is widely used on farmer's fields, human urine other than as part of sewage sludge is not currently allowed to be used in any [clarification needed] commercial agricultural operations. However, there are ongoing studies that have shown that aging urine in closed containers for 12–16 ...
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