The soil quality is always deteriorated by:_________?
Correct answer: D. All of these
- A. Erosion & pollution
- B. Waterlogging & salinization
- C. Nutrient mining
- D. All of these
Explanation
Erosion removes fertile topsoil, pollution adds harmful substances, waterlogging and salinization impair root conditions, and nutrient mining exhausts fertility. Since all listed processes can degrade soil quality, the combined option is correct.
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