Despite the fact that I normally apply MKP for a foliar sprays, at times I'll utilize it like a soil drench for my durian saplings. On the other hand, researchers later learned that they could manipulate several earth minerals to supply K₂SO₄, now the commonest technique of manufacturing. One example https://shanefxqhw.wssblogs.com/32774984/the-fact-about-purchase-sop-fertilizer-for-farming-that-no-one-is-suggesting