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Question
Top-soil contains the following
Options
Humus and living organisms only
Humus and soil particles only
Humus, living organisms and plants
Humus, living organisms and soil particles.
Solution
Humus, living organisms and soil particles.
Explanation:
Topsoil is the soil's top and outermost layer. which is typically 2 to 8 inches thick. It is often black in colour because of humus. which is partially decaying organic matter, soil particles and live creatures such as soil bacteria, among other things.
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