Explain the horizons - oap, Science

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Explain the following horizons:

i) Oap ii) Btk

i) Organic horizon (O) with organic material that has undergone decomposition (a) and has been disturbed or ploughed (p)

ii) Mineral horizon (B) that has been stable long enough to allow an accumulation of clay (t) and calcium carbonate (k) to take place.

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