Soil Resources (Notes-1)

Of all the earth’s crust resources, the one we take most for granted is soil. It can be considered an ecosystem by itself. We are terrestrial animals and depend on soil for life, yet most of us think of it only in negative terms. Soil is a marvelous substance, a living resource of astonishing beauty, complexity and frailty. Half of the soil content is mineral, and the rest is air and water together with a little organic matter from plant and animal residue.