| 1. | The continuous high level of the water table led to soil salination.
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| 2. | Salination occurs due to a combination of natural and human-caused processes.
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| 3. | Iraq suffers from desertification and salination of the soil.
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| 4. | Use of humic acids may prevent excess salination, especially given excessive irrigation.
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| 5. | Efforts to alleviate the soil salination problem since 1995 have minimised the problem.
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| 6. | Other historians point to soil salination as the culprit in the decline in agriculture.
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| 7. | In recent times, the increased soil salination has made the area unsuitable for grazing.
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| 8. | In the Chaco, the salination of already arid land makes farming even more difficult.
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| 9. | Farmers have irrigated the area for a century, so soil salination is becoming a concern.
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| 10. | Salination caused by leaching from aquaculture and contamination by hog raising operations have rendered its waters undrinkable.
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