Explain any three main factors responsible for land degradation.

(i) Mining sites are abandoned after excavation work is complete leaving deep scars and traces of over-burdening.

(ii) Deforestation due to mining has caused severe land degradation.

(iii) Overgrazing is one of the main reasons for land degradation in many parts of the country.

(iv) Over irrigation is responsible for land degradation due to water logging leading to increase in salinity and alkalinity in the soil.

(v) The mineral processing like grinding of limestone generates huge quantity of dust in the atmosphere which retards the process of infiltration of water into the soil after it settles down on the land.