Q. Excessive use of which ofthe following fertilizers may be responsible for the presence of a toxic substance in groundwater?
A) Phosphate only
B) Nitrogen
C) Phosphate and potassium
D) Potassium only
✔ Correct Answer: Nitrogen
Exam Insight
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A) Phosphate only
B) Nitrogen
C) Phosphate and potassium
D) Potassium only
✔ Correct Answer: Nitrogen
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