Phosphate Rock Statistics and Information | U.S- The Project — Chatham Rock Phosphate
hard rock phosphate、、。"hard rock" 。 "phosphate" n. 1.【】 …Rock phosphate or "hard rock phosphate" is a nonrenewable mined material derived from ancient marine life. (As an aside Feb 3 21% calcium and some other essential micro nutrients in small proportions. SSP is an option to optimise the use of ...Rock phosphate is an essential ingredient of manufactured fertiliser and can (if of the appropriate chemical composition) be applied directly to pasture with less environmental damage from run-off than manufactured super-phosphate. … · Its available P2O5 content ranges from 18 to 22 percent,
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