Soil is the uppermost layer of earth's crust. It is formed of rock particles and organic matter called humus.
Soil is a good habitat. Plants depend on soil for nutrients like mineral salts and water.
We depend on soil for agricultural and construction purposes, making utensils and toys.
Soil is important for life on the earth. It supports the existence of living organisms. It is essential for agriculture.
Soil is formed by the weathering of rocks by the action of wind, water and climate. It contains coarse particles, clay, moisture and humus. Soil contains three important layers: top soil, subsoil and bed rock.
Soil profile consists of three horizons. Top soil or Horizon-A, Middle layer or Horizon-B. Third layer or Horizon-C.
Soil is of different types: Clayey, loamy and sandy
Soil holds water in it, which is called soil moisture. Holding capacity of water is important for various crops.
Clayey soil is used to make pots, toys and statues.
Clay and loam are suitable for growing wheat, gram and paddy, cotton is grown in sandy loam or black soil.
Removal of top soil by wind, water or any other means is known as soil erosion.