Guano is a bird excretion product rich in phosphate ions, returning them to the soil.
Guano este un produs de excreție al păsărilor bogat în ioni de fosfat, care returnează aceștia în sol.
| Front | Guano |
|---|---|
| Back | waste product produced by birds which contains a high proportion of phosphate ions. Guano returns a significant amount of phosphate ions to soils. |
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