.Which horizon of soil contain maximum humus. topsoil or not
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The O horizon has freshly-decomposing organic matter, humus, at its surface, with decomposed vegetation at its base. Humus enriches the soil with nutrients, enhancing soil moisture retention. Topsoil, the top layer of soil, is usually two to three inches deep, but this depth can vary considerably.
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a horizon contains maximum humus also called as topsoil
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