By which of the following erosion, desertification is caused by a maximum amount?
1:Soil erosion is the loss of top fertile layer of
soil either by wind or by water.
India is facing this problem in many
parts.
2:The area affected by soil erosion is 5, 00,000 square kilometres. It
adversely affects productivity and economy of the country.
3:If the soil erosion is by wind it is
called wind erosion.
4:Desertification is mainly caused by
wind erosion.