In 1855, the U.S. learned of rich guano deposits on islands in the Pacific Ocean.
From the en.wikipedia.org
Guano has been the main economy until 1963, when still 3000 tons were produced.
From the en.wikipedia.org
Andean peoples collected guano from the coast of Peru for use as soil enricher.
From the en.wikipedia.org
In addition to providing fertilizer, guano bats are exceptional exterminators.
From the time.com
Many do agree, she says, that an occasional whiff of guano or fish is no big deal.
From the heraldtribune.com
Natural resources include fish, guano, undetermined oil and natural gas potential.
From the en.wikipedia.org
There is an abundance of sea birds, and the cays are covered in tons of guano.
From the en.wikipedia.org
Peasants applied mostly natural fertilizers, such as manure, mulch, and bat guano.
From the en.wikipedia.org
Then one of their neighbours grew tired of cleaning guano from his guesthouse.
From the newscientist.com
More examples
The excrement of sea birds; used as fertilizer
Guano (from the Quechua 'wanu', via Spanish) is the excrement (feces and urine) of seabirds, bats, and seals. Guano manure is an effective fertilizer and gunpowder ingredient due to its high levels of phosphorus and nitrogen and also its lack of odor. ...
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Dung from a sea bird or from a bat
Dried bird and bat droppings; rich in phosphate and nitrogen
Excrement, as of bats. In certain bat caves guano can accumulate in such vast quantities that it is mined commercially for fertilizer.
A substance made mainly of the dung of sea birds or bats, which is found in coastal areas or in caves. Guano can be used as fertilizer.
Fertilizer composed of animal waste, especially bat droppings; used as food by some insects
A natural manure composed of chiefly of bat excrement