Difference between revisions of "NPK"
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==Key Stage 4== | ==Key Stage 4== | ||
===Meaning=== | ===Meaning=== | ||
| − | [[NPK]] is a [[mixture]] of [[fertiliser|fertilising]] [[compound]]s used in | + | [[NPK]] is a [[mixture]] of [[fertiliser|fertilising]] [[compound]]s used in agriculture. |
===About NPK=== | ===About NPK=== | ||
Revision as of 21:15, 7 April 2019
Key Stage 4
Meaning
NPK is a mixture of fertilising compounds used in agriculture.
About NPK
- NPK stands for Nitrogen (N), Phosphorous (P), Potassium (K).
- NPK is generally made by reacting Ammonia with Nitric Acid, reacting Ammonia with Phosphoric Acid and combining these in a mixture with Potassium Chloride which is mined from the ground.
Ammonia + Nitric Acid → Ammonium Nitrate
- <chem>NH3 + HNO3 -> NH4NO3</chem>
Ammonia + Phosphoric Acid → Ammonium Phosphate
- <chem>3NH3 + H3PO4 -> (NH4)3PO4</chem>
- NPK can also include other minerals such as Calcium Phosphate and Calcium Sulphate as plants also need both Calcium and Sulphur.