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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, [[Potassium]], [[Manganese]] and [[Magnesium]]
====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. Often the younger [[leaf|leaves]] are purple.
{| class="wikitable"
|[[File:PhosphateDeficiency.png|300px]]
|-
| style="height:20px; width:200px; text-align:center;" |With a [[Phosphate]] '''deficiency''' the [[leaf|leaves]] grow dark and are regularly lost. Often the younger [[leaf|leaves]] are purple.
|}
====Potassium Deficiency====
{| class="wikitable"
|[[File:PotassiumDeficiency.png|300px]]
|-
| style="height:20px; width:200px; text-align:center;" |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====
{| class="wikitable"
|[[File:ManganeseDeficiency.png|300px]]
|-
| style="height:20px; width:200px; text-align:center;" |With a [[Manganese]] '''deficiency''' yellow spots and holes appear between the [[Plant Vein|plant veins]].
|}
====Magnesium Deficiency====
{| class="wikitable"
|[[File:MagnesiumDeficiency.png|300px]]
|-
| style="height:20px; width:200px; text-align:center;" |With a [[Magnesium]] '''deficiency''' the lower [[leaf|leaves]] develop a yellow area which grows from the tips of the [[leaf|leaves]] spreading over the whole [[leaf]] while the [[Plant Vein|veins]] remain green.
|}
===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/1782945954/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945954&linkCode=as2&tag=nrjc-21&linkId=100574c08fbbb64318256eb79ed61a76 ''Deficiency diseases (in plants), page 151, GCSE Biology, CGP, AQA '']