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2. Loam - Wikipedia

   en.wikipedia.org/wiki/Loam

   Soil types by clay, silt and sand composition as used by the United States Department of Agriculture. Loam (in geology and soil science) is soil composed mostly of sand (particle size > 63 micrometres (0.0025 in)), silt (particle size > 2 micrometres (7.9 × 10 −5 in)), and a smaller amount of clay (particle size < 2 micrometres (7.9 × 10 −5 in)).

3. Soil texture - Wikipedia

   en.wikipedia.org/wiki/Soil_texture

   For example, if a soil is 70 percent sand and 10 percent clay then the soil is classified as a sandy loam. The same method can be used starting on any side of the soil triangle. If the texture by feel method was used to determine the soil type, the triangle can also provide a rough estimate on the percentages of sand, silt, and clay in the soil.

4. Physical properties of soil - Wikipedia

   en.wikipedia.org/wiki/Physical_properties_of_soil

   For example, a sandy loam soil with 20% gravel would be called gravelly sandy loam. When the organic component of a soil is substantial, the soil is called organic soil rather than mineral soil. A soil is called organic if: Mineral fraction is 0% clay and organic matter is 20% or more

5. San Joaquin (soil) - Wikipedia

   en.wikipedia.org/wiki/San_Joaquin_(soil)

   The San Joaquin soil was first recognized in the survey of the Fresno Area in 1900. [5] At that time it was mapped as San Joaquin sandy loam on the "Red Formation" and characterized as being underlain by a "red sandstone hardpan." The soil was described as having a hog wallow (mound and swale) relief. The depth to hardpan ranged from 1 foot to ...

6. Sassafras (soil) - Wikipedia

   en.wikipedia.org/wiki/Sassafras_(soil)

   Horizon A (Topsoil)- Brown sandy loam: The topsoil is a bit sticky, has a fine-sized subangular blocky structure, has few roots in the soil, and can be acidic. [ 4 ] Horizon B (Upper Subsoil )- Brown sandy clay loam : The upper subsoil is much like the topsoil and has few roots, can be acidic, but has a more medium blocky structure rather than ...

7. Unified Soil Classification System - Wikipedia

   en.wikipedia.org/wiki/Unified_Soil...

   The Unified Soil Classification System (USCS) is a soil classification system used in engineering and geology to describe the texture and grain size of a soil. The classification system can be applied to most unconsolidated materials, and is represented by a two-letter symbol. Each letter is described below (with the exception of Pt): If the ...