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How many horizons are there in soils?

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How many horizons are there in soils?

(a) One

(b) Two

(c) Three

(d) Four

This question was posed to me in homework.

The above asked question is from Soil and its Pollution topic in section Environmental Pollution of Energy Management

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The correct option is (d) Four

For explanation: There are four horizons in soils. The top layer is known as O-horizon. The uppermost layer of soil called as the A-horizon. The B-horizon called the subsoil, it contains less organic material. The area below the subsoil is called as the C-horizon.

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