Question

what are the cause of soil erosion and what are its conservation measures

Answer 1

In other words, soil erosion is a naturally occurring and slow process that refers to loss of field's top soil by water and wind or through conversion of natural vegetation to agricultural land. When farming activities are carried out, the top soil is exposed and is often blown away by wind or washed away by rain.

Answer 2

Causes of soil erosion can be :
Deforestation
Wind
Forest fires

Conservation method plant more trees