This section contains 61 words (approx. 1 page at 300 words per page) |
Manure created by flying animals that is deposited in a central location because of nesting habits. Guano can occur in caves from bats or in nesting grounds where large populations of birds congregate. Guano was frequently used as a source of nitrogen fertilizer prior to the time when nitrogen fertilizer was commercially manufactured from natural gas.
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This section contains 61 words (approx. 1 page at 300 words per page) |