Question

Why is coarse grabel at the lowest place and humus is at the uppermost position?​

Answer 1

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The uppermost layer is called topsoil and this layer contains humus, plant roots, and living creatures. The more humus found in topsoil, the more nutrient rich the topsoil and the better the conditions for growing plants. The middle layer is called subsoil. This contains more clay and less organic matter.

Answer 2

Correct answer:-

Soil is the top layer of most of our earth. Soil is partly made up of decaying plant or animal remains. These are called organic matter or humus and contain the living and once living components of our soil. Soil mostly contains pieces of disintegrating rocks or inorganic matter, water, and air. The differing amounts of inorganic and organic material in a soil sample provide for the different types of soil that we have.

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