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===About Plant Deficiency Diseases===
: [[Plant]]s gain [[mineral]]s from the [[soil]], so when the [[soil]] lacks certain [[mineral]]s the [[plant]] can become ill.
: The three [[mineral]]s most essential to a [[plant]]s growth are [[Nitrate]]s, [[Phosphate]]s and , [[Potassium]]. These are collectively known as , [[Manganese]] and [[NPKMagnesium]].:
====Nitrate Deficiency====
With a [[Nitrate]] deficiency the upper [[leaf|leaves]] grow light green and lower leaves are yellow and begin to shrivel.
====Phosphate Deficiency====
With a [[Phosphate]] deficiency the [[leaf|leaves]] grow dark and are regularly lost.
====Potassium Deficiency====
With a [[Potassium]] deficiency the tips and edges of young [[leaf|leaves]] are yellow. Over time more yellow patches or dead areas appear on the [[leaf|leaves]].
====Manganese Deficiency====
With a [[Manganese]] deficiency yellow spots and holes appear between the [[Plant Vein|plant veins]].
====Magnesium Deficiency====
With a [[Magnesium]] deficiency the lower [[leaf|leaves]] a yellow area grows from the tips of the [[leaf|leaves]] spreading over the whole [[leaf]] while the [[Plant Vein|veins]] remain green.