understand the use of fertiliser to increase crop yield
Fertilisers - replace the missing nutrients in the soil
Usually in the form of nitrates and phosphates
Taken up into the plant via the roots, transpiration stream, leaf
Nitrates: Proteins
Phosphates: DNA and membrane structure
1. Organic fertilisers
- Produced from animal waste
- Goes through process of decomposition and fermentation to form slurry
- Gives supply of nitrates and phosphates to the soil
2. Artificial fertilisers
- Chemicals
- Potassium nitrate, ammonium nitrate
- Turns into solution in the soil water
NPK fertilisers
- Nitrogen: growth of leaves and stems
- Phosphorus: healthy roots
- Potassium: healthy leaves and flowers
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