write the characteristics features of topsoil
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Top soil is know as A-horizon .If we look at the side it is dug ditch,it is foundation of bulidings.
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Topsoil is the upper, outermost layer of soil, usually the top 5–10 inches (13–25 cm). It has the highest concentration of organic matter and microorganisms and is where most of the Earth's biological soil activity occurs. Topsoil is composed of mineral particles, organic matter, water, and air.
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