why is top layer of the soil considered the most important layer?
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O Horizon - The top, organic layer ofsoil, made up mostly of leaf litter and humus (decomposed organic matter). A Horizon - The layer called topsoil; it is found below the O horizon and above the E horizon. Seeds germinate and plant roots grow in this dark-colored layer.
At its most basic, top soil is the top layer of soil, in which all plants grow. ... Topsoil is so important because it contains all the nutrients that plants need to survive.
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Top layer of soil is considered the most important layer because it contains all the nutrients that plants require.
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