Toxicity of Elements and Soil Pollution · NCERT Biology

The major source of soil pollution affecting mineral nutrition in agricultural fields is:

  1. Natural weathering of rocks
  2. Biological nitrogen fixation
  3. Overuse of agrochemicals
  4. Periodic crop rotation
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Correct answer: Overuse of agrochemicals

Overuse of fertilizers and pesticides introduces toxic substances into the soil. This negatively affects nutrient balance and overall plant health in agricultural fields.

Difficulty: Medium Question 16 of 20

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