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8 April, 16:28

What occurs in the A horizon of soil?

A. Parent material is weathered into smaller fragments.

B. The crystal structure of minerals in rock is broken down.

C. Microorganisms decompose organic compounds into nutrients.

D. Leached minerals from previous layers are precipitated out.

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  1. 8 April, 16:56
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    C.

    This is referred to as the topsoil as consists decomposing organic matter.
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