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2. Unified Soil Classification System - Wikipedia

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

   sand ≥ 50% of coarse fraction passes No.4 (4.75 mm) sieve clean sand SW well-graded sand, fine to coarse sand SP poorly graded sand sand with >12% fines SM silty sand SC clayey sand Fine grained soils 50% or more passing the No.200 (0.075 mm) sieve silt and clay liquid limit < 50 inorganic: ML silt CL lean clay organic: OL organic silt ...

3. Topsoil - Wikipedia

   en.wikipedia.org/wiki/Topsoil

   The United States loses almost 3 tons of topsoil per acre per year. [16] 1 inch (2.5 cm) of topsoil can take between 500 [17] and 1,000 years [18] to form naturally, making the rate of topsoil erosion a serious ecological concern. Based on 2014 trends, the world has about 60 years of topsoil left. [18] [19]

4. Tifton (soil) - Wikipedia

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

   A typical Tifton soil profile consists of an 11 inches (280 mm) topsoil of dark grayish brown loamy sand.The subsoil extends to about 65 inches, strong brown fine sandy loam to 22 inches; yellowish brown sandy clay loam to 40 inches; yellowish brown mottled, sandy clay loam to 60 inches, and strong brown, mottled sandy clay to 65 inches.

5. What’s The Difference Between Potting Mix And Potting ... - AOL

   www.aol.com/difference-between-potting-mix...

   It consists of different sizes of particles, classified as clay, silt, or sand, which make up the soil texture. Thus, bags of potting soil, or garden soil, are intended for in-ground use. Meet The ...

6. Soil texture - Wikipedia

   en.wikipedia.org/wiki/Soil_texture

   If the percentages of sand, clay, and silt in the soil sample are known, then the triangle can be used to determine the soil texture classification. For example, if a soil is 70 percent sand and 10 percent clay then the soil is classified as a sandy loam.

7. Soil in the United States - Wikipedia

   en.wikipedia.org/wiki/Soil_in_the_United_States

   Soils are the product of climate, organisms and topography, acting on parent (geologic) material over time. Thus the great diversity of geologic materials, geomorphic processes, climatic conditions, biotic assemblages and land surface ages in the United States is responsible for the presence of an enormous variety of mineral and organic soils.