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Examine the soil profile and use the drop-down menu to select what each label identifies.
Label O (top soil, organic material, weathered rock)
Label A (top soil, organic material, subsoil)
Label B (top soil, subsoil, weathered rock)
Label C (organic material, subsoil, weathered rock)
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Examine the soil profile and use the drop-down menu to select what each label identifies.
Label O (...