Editing Potassium deficiency (plants) (section)

==Prevention and cure==

The most widely used potassium fertilizer is [[potassium chloride]] (muriate of potash).<ref name="DEFRA2010">{{cite book|last1=DEFRA|title=Fertiliser manual (RB209)|date=2010|publisher=TSO|location=Norwich|isbn=9780112432869|edition=8th}}</ref> Other inorganic potassium [[fertilizer]]s include [[potassium nitrate]], [[potassium sulfate]], and [[monopotassium phosphate]]. [[Wood ash]] also has high potassium content but must be used cautiously due its effect on pH level.<ref>{{Cite web|title=Wood ash: using in the garden|url=https://www.rhs.org.uk/advice/profile?PID=621|access-date=2020-08-20|website=www.rhs.org.uk|language=en-gb}}</ref> Adequate moisture is necessary for effective potassium uptake; low soil water reduces K uptake by plant roots. Liming acidic soils can increase potassium retention in some soils by reducing leaching;<ref name=b2/> practices that increase [[soil organic matter]] can also increase potassium retention.