there were a lot of moas around . At one stage there huge buried bone piles were mined for fertilizer .
have a read of this.
https://books.google.co.nz/books?id=...istory&f=false
https://books.google.co.nz/books?id=...20site&f=false
I heard there was so much of it that they built train tracks to the middens to ship it.
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