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Glossary of Selected Terms <br /> ALKALI (SODIC) SOIL - generally, a highly alkaline soil . Specifically, an alkali soil <br /> which has a high degree of alkalinity (pH 8.5 or higher) or a high percentage of <br /> exchangeable sodium (15 percent or more of the total exchangeable bases), or both. <br /> ALLUVIUM - 1 ) locally derived - unconsolidated mineral material deposited on sideslopes <br /> and valley floors by local unconcentrated downslope runoff, accompanied somewhat by <br /> gravitational forces. 2) stratified-mineral material that has been subjected to <br /> appreciable transport in suspension with concentrated water flow and deposited in <br /> highly variable layers. <br /> ARGILLIC - a subsoil, specifically a B horizon, typified by accumulations of clay <br /> translocated form the horizons above. The horizon is identified by a subscript <br /> letter "t". <br /> CALCIC - A horizon of accumulation of calcium carbonate or of calcium and magnesium <br /> carbonate. The horizon is identified by the subscript letter "k". <br /> COARSE FRAGMENTS - mineral particles or rocks having diameter greater than 2 millimeters, <br /> such as gravels, cobbles, channers, and stones. <br /> COARSE-LOAMY - generally, a soil textural class having less than 18 percent clay by weight <br /> in the fine-earth fraction, and 15 percent or more of the soil particles are fine <br /> sand or coarser. Textures are not sandy (see sandy). <br /> COLLUVIUM - Soil material , rock fragments, or both moved by creep, slide, or local wash <br /> and deposited at the bases of slopes. <br /> DEEP - the soil is 40 to 60 inches deep over bedrock. <br /> FAMILY - A level of classification in the soil taxonomic system; a group of soils having <br /> similar physical and chemical properties that affects their response to management <br /> and manipulation for use. <br /> FINE - a soil textural class having 35 to 59 percent clay in the fine-earth fraction, by <br /> weight. <br /> 9-5-32 Revised 04/11/88 <br />