GCSE Chemistry (AQA)

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NPK Fertilisers

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Using resources The Haber process and the use of NPK fertilisers

NPK Fertilisers

4:31 Manufacture and Use of NPK fertilisers
Spec 4.10.4.2
Previous Composites Next Making NPK Fertilisers
  • Plants require nitrogen, phosphorus, and potassium for healthy growth.
  • Two plants grown under different conditions: one with ample nutrients, the other nutrient-deprived.
  • Nutrient-rich plant has strong growth; nutrient-deprived plant has weak stem and dying leaves.
  • Plants absorb mineral ions containing essential nutrients from soil water through roots.
  • Nutrients are found in nitrate ions, phosphate ions, and potassium ions.
  • Natural soil ion concentration can deplete as plants grow and are harvested.
  • Farmers use fertilizers to replenish soil nutrients, which can be natural (compost, manure) or artificial.
  • Fertilizers enhance agricultural productivity by ensuring sufficient nutrients for crops.
  • NPK fertilizers contain compounds of nitrogen (N), phosphorus (P), and potassium (K).
  • Fertilizers are formulated with specific ratios of elements based on plant needs.
  • NPK fertilizers are made using soluble salts, which must dissolve in water for plant absorption.
  • Soluble compounds for nitrogen include ammonium and nitrate ions; for phosphorus, phosphate ions; all common potassium compounds are soluble.

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