Unit 4: Agriculture - Reducing Soil Erosion
- Created by: rosieevie
- Created on: 19-05-15 13:46
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- Reducing Soil Erosion
- Cultivation of Long-Term Crops e.g. fruit, trees
- Does not require regular soil disturbance so erosion is reduced
- Not Cultivating on Steep Slopes
- Terracing
- Horizontal fields landscaped onto hills with retaining walls - prevents drainage water flowing down hills
- Contour Ploughing
- Up and down creates farrows - more runoff so ploughing along slows water down
- Ploughing Across the Wind
- Right angles to prevailing winds creates ridges that reduce wind speeds
- Zero-Tillage Farming (No Ploughing)
- Direct drilling to plant seeds and weed control reduces ploughing
- Tied Ridges
- Interconnecting ridges surround hollows where crops are grown - rainwater collects and infiltrates soil
- Windbreaks
- Hedgerows and trees reduce wind velocity
- Multicropping
- Lots of crops at the same time = planting and harvest at different times
- ***** Cropping
- Multicropping where crops are grown in long narrow strips
- Mulching
- Adding dead organic matter to soil, reducing soil disturbance
- Increasing Soil Organic Matter Content
- Control of Livestock
- Reducing numbers prevents overgrazing and trampling
- Remove animals in extreme weather - avoid bogging or compaction
- Supplementary feeding and restricting movement
- Cultivation of Long-Term Crops e.g. fruit, trees
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