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Q.

Which one of the following is the main cause of land degradation in Punjab?

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a

Intensive cultivation

b

Deforestation

c

Over irrigation

d

Overgrazing 

answer is C.

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Detailed Solution


Over-irrigation is the main cause of land degradation in Punjab. Irrigation is an essential step for growing crops. But, over-irrigation causes waterlogging. That leads to increased salinity and alkalinity of the soil. When the salt consistency in the earth is more, the water flows back to the roots of the crops. The alkalinity of soil increases with a high pH value. As a result, all the nutrient contents like iron and zinc in the soil decrease.
 
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