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Ref. Page No. M2009-006 00106 <br /> Custom Soil Resource Report <br /> Soil Information for All Uses <br /> Soil Reports <br /> The Soil Reports section includes various formatted tabular and narrative reports <br /> (tables)containing data for each selected soil map unit and each component of each <br /> unit. No aggregation of data has occurred as is done in reports in the Soil Properties <br /> and Qualities and Suitabilities and Limitations sections. <br /> The reports contain soil interpretive information as well as basic soil properties and <br /> qualities. A description of each report (table) is included. <br /> Soil Qualities and Features <br /> This folder contains tabular reports that present various soil qualities and features. <br /> The reports (tables) include all selected map units and components for each map <br /> unit. Soil qualities are behavior and performance attributes that are not directly <br /> measured, but are inferred from observations of dynamic conditions and from soil <br /> properties. Example soil qualities include natural drainage, and frost action. Soil <br /> features are attributes that are not directly part of the soil. Example soil features <br /> include slope and depth to restrictive layer. These features can greatly impact the <br /> use and management of the soil. <br /> Soil Features <br /> This table gives estimates of various soil features. The estimates are used in land <br /> use planning that involves engineering considerations. <br /> A restrictive layer is a nearly continuous layer that has one or more physical, <br /> chemical, or thermal properties that significantly impede the movement of water and <br /> air through the soil or that restrict roots or otherwise provide an unfavorable root <br /> environment. Examples are bedrock, cemented layers, dense layers, and frozen <br /> layers. The table indicates the hardness and thickness of the restrictive layer, both <br /> of which significantly affect the ease of excavation. Depth to top is the vertical <br /> distance from the soil surface to the upper boundary of the restrictive layer. <br /> Subsidence is the settlement of organic soils or of saturated mineral soils of very low <br /> density. Subsidence generally results from either desiccation and shrinkage, or <br /> oxidation of organic material, or both, following drainage. Subsidence takes place <br /> gradually, usually over a period of several years. The table shows the expected initial <br /> subsidence, which usually is a result of drainage, and total subsidence, which results from <br /> a combination of factors. <br /> Potential for frost action is the likelihood of upward or lateral expansion of the soil <br /> caused by the formation of segregated ice lenses (frost heave) and the subsequent <br /> collapse of the soil and loss of strength on thawing. Frost action occurs when <br /> moisture moves into the freezing zone of the soil. Temperature, texture, density, <br />