Unit 4: Agriculture - Fertilisers
- Created by: rosieevie
- Created on: 18-05-15 13:23
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- Fertilisers
- Natural Fertilisers
- Advantages
- Gradual release of nutrients - one application lasts
- Cheap - often wastes
- Increase soil humus content
- Provide food for soil biota
- Disadvantage
- Doesn't provide nutrients quickly
- Bulky - hard to apply and transport
- Cannot be applied during crop growth
- Uncontrollable nutrient content
- Advantages
- Artificial Fertilisers
- Advantages
- Controllable nutrient content
- Fast-acting - as soon as applied
- Easy mechanical application
- Disadvantage
- Doesn't add humus or provide food for biota
- Can be toxic to soil biota
- Expensive and energy-consuming to make
- Can be leached, causing eutrophication
- Advantages
- Macronutrient - nutrient needed in large amounts e.g. C, N, P
- Micronutrient - nutrient needed in small amaounts e.g. Ca, K
- Natural Fertilisers
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