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Custom Soil Resource Report <br /> generally is built so that the field can be farmed. A terrace intended mainly for <br /> drainage has a deep channel that is maintained in permanent sod. <br /> Terrace (geomorphology) <br /> A steplike surface, bordering a valley floor or shoreline, that represents the <br /> former position of a flood plain, lake, or seashore. The term is usually applied <br /> both to the relatively flat summit surface (tread) that was cut or built by stream <br /> or wave action and to the steeper descending slope (scarp or riser) that has <br /> graded to a lower base level of erosion. <br /> Te rracettes <br /> Small, irregular steplike forms on steep hillslopes, especially in pasture, formed <br /> by creep or erosion of surficial materials that may be induced or enhanced by <br /> trampling of livestock, such as sheep or cattle. <br /> Texture, soil <br /> The relative proportions of sand, silt, and clay particles in a mass of soil. The <br /> basic textural classes, in order of increasing proportion of fine particles, are <br /> sand, loamy sand, sandy loam, loam, silt loam, silt, sandy clay loam, clay loam, <br /> silty clay loam, sandy clay, silty clay, and clay. The sand, loamy sand, and <br /> sandy loam classes may be further divided by specifying "coarse," "fine," or <br /> "very fine." <br /> Thin layer <br /> Otherwise suitable soil material that is too thin for the specified use. <br /> Till <br /> Dominantly unsorted and nonstratified drift, generally unconsolidated and <br /> deposited directly by a glacier without subsequent reworking by meltwater, and <br /> consisting of a heterogeneous mixture of clay, silt, sand, gravel, stones, and <br /> boulders; rock fragments of various lithologies are embedded within a finer <br /> matrix that can range from clay to sandy loam. <br /> Till plain <br /> An extensive area of level to gently undulating soils underlain predominantly by <br /> till and bounded at the distal end by subordinate recessional or end moraines. <br /> Tilth, soil <br /> The physical condition of the soil as related to tillage, seedbed preparation, <br /> seedling emergence, and root penetration. <br /> Toeslope <br /> The gently inclined surface at the base of a hillslope. Toeslopes in profile are <br /> commonly gentle and linear and are constructional surfaces forming the lower <br /> part of a hillslope continuum that grades to valley or closed-depression floors. <br /> 70 <br />