Question:

The layer of soil that is a mixture of minerals and organic material is the?

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A. O horizon

B. A horizon

C. humus

D. primary layer

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2 ANSWERS


  1. Humus (i think)


  2. B. A horizon

    From reading a few sites, I think it is the A horizon.

    "The A horizon is the surface layer where organic mater accumulates and is intermixed with the mineral fraction."

    http://www.metaglossary.com/meanings/643...

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