You might be on to something here Micro. I just went back and looked at the newest loading pictures, and the pile the huge hydraulic crane is loading from, seems to be of a finer  texture and a lighter color than the pile of ore just to the left. Maybe Bao decided to get into the fertilizer business..

Either that or the taxes are a lot less on fertilizer and Bao can process 45% ore just as well as 62% ore so they just called it fert and shipped it that way.. 

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