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.
Their vast trunks and root systems store carbon dioxide, move water, and produce oxygen that is released into the atmosphere. The organic matter of the soil develops primarily from decayed leaves, twigs, branches, roots, and fallen trees, all of which recycle nitrogen, carbon, oxygen, and other important nutrients.