Gravel Driveway Basics. Cost: $1 to $5 per square foot, though installation costs vary widely depending on where you live and the type of base required. Durability: Lifetime, with proper maintenance. Type of gravel: This depends on your area, but angular shapes are preferred over round.
Soil minerals form the basis of soil. They are produced from rocks (parent material) through the processes of weathering and natural erosion. Water, wind, temperature change, gravity, chemical interaction, living organisms and pressure differences all help break down parent material.
Soil is a natural resource, which is required for production of food, industrial raw materials as well as for generation of energy resources. It is also a natural value, which is protected as natural heritage. From the viewpoint of natural resource, natural value and spatial factor it is irreplaceable for development and existence of mankind.