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Topsoil contains the following:A. Humus and living organisms only B. Humus and soil particles only C. Humus, living organisms and plants D. Humus, living organisms and soil particles |
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Answer» This is because humus is nothing but the topmost fertile layer. This layer is fertile because it has all the nutrients required for the growth of plants, also microorganisms are also present in this layer because it is airier as compared to the soil layers below. Since it is the fertile layer, plants are also found in it and the dead decay of plants is received by the top layer only leading to the formation of more humus. |
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