Question

how desetification caused

Answer 1

desertification is caused due to deforestation . Deforestation leaves the soil naked and leads to soil erosion . due to this the soil becomes less fertile and, at a time , the lower Rocky layers are exposed. This leads to desertification

Answer 2

Deforestation causes an increase in soil erosion. As the topsoil gets eroded, the lower hard and rocky soil with less humus gets exposed. This soil is less fertile. Over time, continued soil erosion can convert the land into a desert. This is called desertification.