Question

A typical mineral soil, on volume basis, contains:

A Mineral material 45%, organic matter 15% air 10-20% and water 20-30%
B Mineral material 55%, organic matter 5%, air 10-20% and water 20-30%
C Mineral material 45%, organic matter 5% air 20-30% and water 20-30%
D Mineral material 55%, organic matter 5%, air 20-30% and water 10-20%
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