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The most common cause of desertification is the over cultivation or over grazing of desert lands. Over-cultivation causes the nutrients in the soil to be depleted faster than they are restored. Improper irrigation practices result in salinated soils, and depletion of aquifers.

Excessive abstraction of groundwater and removal of native species to facilitate farming are also contributory factors.

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Q: What are 4 reasons for desertification?
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