Fertilizers
Page 29 of the CGP A2-Level Biology Revision Guide.
- Created by: Hannah Kent
- Created on: 24-01-14 17:26
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- Fertilizers
- Fertilizers are chemicals that provide crops with minerals needed for growth, eg. Nitrates.
- Crops use up minerals in the soil as they grow, so their growth is limited when there isn't enough minerals.
- Adding fertilizers replaces the lost minerals, so more energy from the ecosystem can be used to grow.
- Increasing the efficiency of energy conversion
- Adding fertilizers replaces the lost minerals, so more energy from the ecosystem can be used to grow.
- Crops use up minerals in the soil as they grow, so their growth is limited when there isn't enough minerals.
- Natural Fertilizers
- They are organic matter. Including; manure and sewage sludge.
- Artificial Fertilizers
- They are inorganic. They contain pure chemicals as powder or pellets
- Issues for the Environment
- Eutrophication
- Can alter the balance of nutrients too much and cause the crop or others plants to die
- Economic Issues
- Farmers need to get the amount of fertilizer just right.
- Too much and money is wasted
- Too little and productivity won't be increased and so they can't sell the crop for much money
- Farmers need to get the amount of fertilizer just right.
- Fertilizers are chemicals that provide crops with minerals needed for growth, eg. Nitrates.
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