SOILS - SOILS * fine material covering the earth's surface...

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SOILS ** fine material covering the earth's surface composed of both mineral & organic material; dirt ** weathering provides the raw materials ( parent material) for soil * Soil Characteristics : * soil profile: the array of soil layers; their sequence from top (surface) to bottom (bedrock) * soil horizon: a distinct layer of soil within the soil profile * Soil Properties: * color * texture (clay, sand, silt) * structure * consistence (cohesion) * porosity * moisture SOIL FORMATION * an on-going process of a renewable resource, but not an inexhaustible resource ** Components of Soil: Minerals: elements or compounds with a crystalline structure; the building-blocks of rocks; found in all soils
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Organic matter: that part originally from living matter; decaying matter of plants, animals and their waste products Water: fills spaces in the soil or forms a thin film around particles Air: also fills pour spaces ** Factors Involved in Formation : (read news report 18 pg 583) Parent Material: ** residual soil: made from the underlying rock ** transported soil: made from material not found in underlying rock Climate: If T and precipitation (moisture) differ, will yield different soils, even from same parent material Biological Agents: decomposers, microorganisms, bacteria, fungi, type of humus or organic matter Topography:
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SOILS - SOILS * fine material covering the earth's surface...

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