Soil is the uppermost layer of the Earth's crust and is usually composed of a thin layer of mineral particles, and a layer of dead and decayed plant and animal remains called humus.
Soil is not just a layer of dirt and mud. It is actually filled with life. There are a variety of insects, reptiles, and many other animals right under our feet.
Soil also provides the vital nutrients required for plants to grow and thrive. Thus, all living organisms depend directly or indirectly on soil.
