ABSTRACT
The soft topsoil layers vary in depth, color, clay, silt, sand, gravel, and stones, stratifications and structure, moisture, and vegetation. Garden soils look rich and mellow and may be spaded with ease in contrast with shallow soils on steep hillslopes of wilderness areas. The nature of the component parts of soil determines its capacity to stabilize the movement of pollutants. The broadest grouping of these components is a three-phase system of solid, liquid, and gas. The biological characterization of natural soils is centered on the soil microorganisms since they exert a profound impact on waste constituent mobility to rock destruction by weathering. The single most important means of altering the natural soil microflora is to alter the energy or food source. The microflora adjusts to the kind of material and circumstance with which it is confronted, whether gas, liquid, solid, organic or inorganic substance.
