Question
What is the cation exchange capacity of humus? (
- A 2 - 15 C mol (p+) kg -1 (
- B 250 - 1500 C mol (p+) kg -1 (
- C 25 - 150 C mol (p+) kg -1 (
- D 0 - 2 C mol (p+) kg -1 (
- E None of these
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