Answer: Bone meal is used as a high phosphorus fertilizer, containing upward of 30 percent. Most bone meal is a steamed type, containing one to two (1 to 2) percent nitrogen in addition to the phosphorus. It's considered an organic fertilizer and, among other uses, is often added to the planting hole prior to planting flowering bulbs.
Most of the bones used in bone meal come from packing and slaughter houses.
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