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Question

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


A
Deforestation
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B
Intensive cultivation
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C
Over-grazing
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D
Over-irrigation
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Solution

The correct option is D Over-irrigation

Irrigation is artificial application of water to land to assist in the production of crops.

Research have shown that excess/more water can increase weed pressure and create an environment favorable to diseases.

Over –Irrigation is main cause of land degradation in Punjab due to water logging leading to increase in salinity and alkalinity in the soil.

Punjab, Haryana, Western Uttar Pradesh are states facing issue of land degradation.

Below are effects of Over-irrigation:-

-Disturbs the oxygen balance of the root zone, drown roots reduce plant water uptake and thus stress in plants.

-Reduce the oxygen exchange between soil and atmosphere and causes reductions in root growth.

-Increase the chances of root diseases and microbial growth which can result in sulfides which are toxic to plants.

Geography

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