Guano phosphate refers to a number of caves in tropical ocean islands and some mainland coast of modern biological deposition.
Gregarious fish-eating seabird droppings contain phosphates, nitrates, ammonium salts and organic matter, long-term accumulation of guano guano layer is formed. When guano layer decomposition, oxidation of organic matter, soluble salts were rinsed with phosphate and partially remains in situ as guano phosphate layer, which contains phosphorus pentoxide 10% to 30%, up to 40% small amounts of nitrogen and potassium fertilizers are well integrated. There are similar with guano phosphate mineral, bat bones, feces can also be stacked to form a phosphorus, nitrogen and potassium fertilizers.
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