Intellectual Olympiad in Soil Science - 2026 ongoing

Subject: Soil Science
Level: XI
Category: student
Quiz questions: in English
Example question: A soil has a cation-exchange capacity of 36 cmol(+) kg⁻¹, of which 9 cmol(+) kg⁻¹ are occupied by exchangeable magnesium. What is the magnesium saturation? 12.5%, 20%, 30%, 25%