Question

B. Give reasons for the following.
1. The fertility of soil is lost due to soil erosion.
2. Embankments are built near rivers.
casonal vegetables and pulses should be grown after a crop has been harvested.
4. Trees prevent soil erosion.
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Answer 1

1. fertility of soil is lost as top layer of soil is very fertile which gets eroded. next layer is not very fertile. so soil becomes infertile
3. such types of plants helps in replenishing the nutrients to the soil.
4. trees bind the soil by its root . this prevent it from blown away