the top two layer of soil are vital for life justify?
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Its not just important, it is essential. A lot of the worlds soil has been badly degraded by industrialised farming and the removal of trace elements. Plus also we lose a lot of topsoil by tilling, which causes the topsoil to be removed by the action of wind and rain. Poor soil = poor quality food and hence bad nutrition.
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Soil is a thriving ecosystem! There are different layers in soil that serve different purposes.Humus is the top layer of soil and is rich in organic matter and nutrients. Top soil lies below and contains humus, which is very nutrient and mineral rich and ideal for plant growth.
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