1. Techniques for improving crop yield
1.1. 1. Crop rotation
1.1.1. sustainable
1.1.2. mantains soil fertility
1.2. 2. Fertilisers
1.2.1. inorganic vs organic
1.2.2. overuse
1.2.2.1. dehydration, excess growth, eutrophication (Algae bloom: lack of oxygen, sunlight block)
1.2.3. organic= sustainable
1.3. 3. Irrigation
1.3.1. Lack of: dehydration.
1.3.2. trickle drip, clay pot, sprinkles
1.3.2.1. systems:
1.4. 4. Control of competing organisms - Controlling pests and diseases
1.4.1. chemical substances.
1.4.1.1. Overuse: might generate resistance or kill beneficial organisms
1.5. 5. Selective breeding
1.5.1. Chooses the characteristics
1.5.2. Risk of reducing genetic variation
1.6. 6. Genetic modification
1.6.1. Insert new genes in a species
1.7. 7. Controlling the crop environment
1.7.1. Temperature
1.7.2. Light level
1.7.3. Humidity
1.7.4. sustainable
1.8. 8. Greenhouses and Hydroponics
1.8.1. Control System.
1.8.2. Easy to harvest
1.9. Day length
1.10. Better Motors.
1.11. Better Lighting.
1.12. Upgrade fans screening.
1.13. Water
2. Types of agriculture
2.1. Subsistence farming
2.2. Commercial farming
2.3. Arable farming
2.4. Pastoral farming
2.5. Mixed farming
2.6. Extensive production
2.7. Intensive production
3. Soil
3.1. Components
3.1.1. Mineral particles
3.1.2. Water
3.1.3. Air
3.1.4. Organic matter
3.2. Particle size
3.2.1. Sand
3.2.2. Silt
3.2.3. Clay
3.3. Erosion
3.3.1. Causes
3.3.1.1. Wind erosion
3.3.1.2. Water erosion
3.3.1.3. Removal of natural vegetation/ deforestation
3.3.1.4. Overgrazing
3.3.1.5. Overcultivation
3.3.2. Impacts
3.3.2.1. Floods
3.3.2.2. Loss of decomposers
3.3.2.3. Degradation of soil
3.3.2.4. Loss of fertiliy
3.3.3. Prevention
3.3.3.1. Natural vegetation
3.3.3.2. Strip cropping
3.3.3.3. Riprapping
3.3.3.4. Contour plowing
3.3.3.5. Terracing
3.3.3.6. Crop rotation
3.3.3.7. Adding organic matter
3.3.3.8. Bunds
3.3.3.9. Wind breaks