Mammoth-Mud-9609 t1_jd8flyg wrote
Before industrial fertilizer was mass produced in the 20th Century guano was used. Guano is concentrated bird or bat droppings containing high levels of nitrates, phosphates and potassium all of which can promote plant growth. https://youtu.be/mVY08GnyR4A
zachzsg t1_jd9xlft wrote
My neighbor does this lol. Harvests the bat shit in his shed and uses it on his little garden
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