The University of Arizona Herbarium
Homer Leroy Shantz
Dumping blueground. Soil or rock 5 miles from the mines is spread out on immense floors where it is harrowed and watered and allowed to slack for a period of 8-18 months. It is then gathered up and taken to the washers. Almost agriculture in this stage at least. [Shantz travel journal, Sep. 24, 1919]
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