Intellectual Olympiad in Soil Science - 2026 ongoing
1000 ₸
Subject: Soil Science Level: XI (I is easiest, XII is hardest)
Category: student
Question language: English
Questions: 15
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%