Phosphate v Potash in Fertilizers

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    I've been doing a bit of reading on fertilisers and how plants need NPK  (Nitrogen, Phosphorus and Potassium). I'm fairly okay on potash and the differences between MOP and SOP and most analysis favouring the latter..

    But does anyone any information on a comparison between Phosphorus v Potash? Or some comparison on the outlook of either? My basic understanding on what I've read about fertilizers is that it's obviously helpful if crop prices are higher so they don't cut corners on cheaper fertilizers . But everything I've tried to find on composition of fertilizers shows different combinations of Phosphorus and phosphate (between 5-10% of each).

    Some useful stuff I've found so far. Sorry to be a bit of a dump, but just trying to get my head around it. D

    Does anyone have any views on Potash v Phosphate?

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