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In page Ptolemy II Philadelphus:
"The Zenon papyri also record experiments by the dioiketes Apollonius to establish cash crop regimes, particularly growing castor oil, with mixed success. In addition to these measures focused on agriculture, Ptolemy II also established extensive gold mining operations, in Nubia at Wadi Allaqi and in the eastern desert at Abu Zawal.[citation needed]
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