Soil The uppermost layer of Earth’s crust, which supports terrestrial plants, animals, and microorganisms and which consists of a complex mixture of inorganic materials, organic materials, air, and organisms 7/20/2015 25
SoilThe uppermost layer of Earth’s crust, which supports terrestrial plants, animals, and microorganisms and which consists of a complex mixture of inorganic materials, organic materials, air, and organisms7/20/2015 25