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Insectivorous bats, such as this Mexican free-tailed bat, have historically been the most important producers of bat guano. Bat guano is partially decomposed bat excrement and has an organic matter content greater than 40%; it is a source of nitrogen, and may contain up to 6% available phosphate (P 2 O 5). [2] [3] Raw insectivorous bat guano
Bat guano is a natural and organic fertilizer that not only benefits the plants, but also benefits the bats as many gardeners will build bat houses to house the bats, their natural fertilizer supplier. Bat guano contains many elements that benefit plant growth: carbon, nitrogen, sulfur, and phosphorus.
The guano actually came from free-tailed bats, Tadarida brasiliensis, which eat insects. Martin collected a sample from 7 ft (2m) below the surface of the guano, which yielded a radiocarbon date of 12,900 ± 1,500 years ago. The miners reported finding "bat graveyards," some with mummified free-tail bats. No giant meat-eating bats were discovered.
Bat guano has been used as a fertilizer for thousands of years, most prominently by the Incans, who valued bats and their guano so much, the penalty for killing a bat was death. Bat guano is high in elements such as carbon, nitrogen, sulfur, and phosphorus. Guano typically contains about 10% nitrogen, which helps plants keep a healthy and ...
The guano-boom increased economic activity in Peru considerably for a few decades until all 12.5 million tons of guano deposits were exhausted. [16] [17] Research was initiated to find alternative sources of fertilizer. The Atacama Desert, at that time part of Peru, was home to significant amounts of saltpeter (sodium nitrate). At the time of ...
Guano is the accumulated excrement of seabirds and bats. As a manure, guano is a highly effective fertilizer due to its exceptionally high content of nitrogen, phosphate, and potassium: key nutrients essential for plant growth. Guano was also, to a lesser extent, sought for the production of gunpowder and other explosive
It is the home to 250,000 bats and also attracts viewers. The Mexican free-tailed bat is the official flying mammal of the state of Texas, [39] as well as Oklahoma. [40] Hundreds of tons of guano were mined in Texas annually between 1900 and 1980. In the early 20th century, bat guano was Texas' largest mineral export, before oil.
Saltpeter Mine Ruins in Mammoth Cave. The process involved burial of excrements (human or animal) in the fields prepared for that purpose beside the nitraries, watering them and waiting until the leaching process did its job; after a certain time, operators gathered the saltpeter that "came out" to the ground surface by efflorescence.
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