1)What causes soil erosion ?2) Describe methods to conserve soil. 3)What would happen if all the trees in forests are cut?4) How can the fertility of soil be maintained ?
Answers
Answer:
1. What Causes Erosion? Soil erosion occurs primarily when dirt is left exposed to strong winds, hard rains, and flowing water. ... When trees are cleared away, the land is left exposed to wind and rain without the security of roots to prevent the soil from being swept away. Climate is also a major driver of erosion.
2. Soil conservation methods
Afforestation.
Checking Overgrazing.
Constructing Dams.
Changing Agricultural Practices.
Crop Rotation.
Strip Cropping.
Use of Early Maturing Varieties.
Contour Ploughing.
3. Eighty per cent of land animals and plants live in forests and without the trees most of them will die. Trees also keep the ground wet and cool, and help to drive the water cycle. ... With no trees, the land will heat up and dry out and the dead wood will inevitably result in enormous wildfires.
4. Soil fertility can be further improved by incorporating cover crops that add organic matter to the soil, which leads to improved soil structure and promotes a healthy, fertile soil; by using green manure or growing legumes to fix nitrogen from the air through the process of biological nitrogen fixation; by micro-dose ...
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