Soil identification on the basis of metal content

¿ Soil is the thin layer of material covering the earth¿s surface and is formed from the weathering of rocks. It is made up mainly of mineral particles, organic materials, air, water and living organisms.Soil is generally defined as ¿Thin layer of earth¿s crust which serves as a natural medium for the growth of plants¿. Soil differs from the parent material in the morphological, physical, chemical and biological properties.