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Internet Glossary of Soil Science Terms
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clayey: (i) Texture group consisting of sandy clay, silty clay, and clay soil textures. See also soil texture. (ii) Family particle-size class for soils with 35% or more clay and <35% rock fragments in upper subsoil horizons.
fine texture: (i) A broad group of textures consisting of or containing large quantities of the fine fractions, particularly of silt and clay. (Includes all sandy clay, silty clay, and clay textural classes). (ii) When used in reference to family particle-size classes in U.S. soil taxonomy, is specifically defined as having 35 to 60 percent clay. See also soil texture.
loamy: (i) Texture group consisting of coarse sandy loam, sandy loam, fine sandy loam, very fine sandy loam, loam, silt loam, silt, clay loam, sandy clay loam, and silty clay loam soil textures. See also soil texture. (ii) Family particle-size class for soils with textures finer than very fine sandy loam but <35% clay and <35% rock fragments in upper subsoil horizons.
moderately-fine textured: Texture group consisting of clay loam, sandy clay loam, and silty clay loam textures. See also soil texture.
silty clay: A soil textural class. See also soil texture.
silty clay loam: A soil textural class. See also soil texture.
silty clay: Soil material that contains 40% or more clay and 40% or more silt.
silty clay loam: Soil material that contains 27 to 40% clay and <20% sand.
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