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  2. Unified Soil Classification System - Wikipedia

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

    > 50% of coarse fraction retained on No.4 (4.75 mm) sieve clean gravel <5% smaller than No.200 Sieve GW well-graded gravel, fine to coarse gravel GP poorly graded gravel gravel with >12% fines GM silty gravel GC clayey gravel sand ≥ 50% of coarse fraction passes No.4 (4.75 mm) sieve clean sand SW well-graded sand, fine to coarse sand SP

  3. 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)).

  4. Hydrophobic soil - Wikipedia

    en.wikipedia.org/wiki/Hydrophobic_soil

    Although it mainly appears in coarse-textured soils such as sand-dominated soils, it affects soils of all different soil types and has been reported in forests, pastures, agricultural plots, and shrublands. [6] Generally, the degree of hydrophobicity is more severe in the soils of legume-grass pastures compared to cultivated agricultural fields ...

  5. Physical properties of soil - Wikipedia

    en.wikipedia.org/wiki/Physical_properties_of_soil

    Optimum temperatures for tree root growth range between 10 °C and 25 °C in general [98] and for spruce in particular. [99] In 2-week-old white spruce seedlings that were then grown for 6 weeks in soil at temperatures of 15 °C, 19 °C, 23 °C, 27 °C, and 31 °C; shoot height, shoot dry weight, stem diameter, root penetration, root volume ...

  6. Constructed wetland - Wikipedia

    en.wikipedia.org/wiki/Constructed_wetland

    The plants remove about seven to ten percent of pollutants, and act as a carbon source for the microbes when they decay. Different species of aquatic plants have different rates of heavy metal uptake, a consideration for plant selection in a constructed wetland used for water treatment. Constructed wetlands are of two basic types: subsurface ...

  7. Can I use sand as cat litter? We asked a vet to find out! - AOL

    www.aol.com/sand-cat-litter-asked-vet-120000565.html

    Cons: 1. Limited absorbency Sand is not as absorbent as the best cat litter, which can lead to excess moisture in the litter box.. 2. Poor odor control Sand does little to neutralize odors ...

  8. 2 Women Were Forced at Gunpoint to Dig Their Own Graves ... - AOL

    www.aol.com/lifestyle/2-women-were-forced...

    The incident began when Hunter Jr. approached Pasco and Pugh while they were sitting idle in their vehicle at a street corner in Stotts City, according to local outlet KOLR 10.

  9. Soil conditioner - Wikipedia

    en.wikipedia.org/wiki/Soil_conditioner

    Soil conditioners may be used to improve water retention in dry, coarse soils which are not holding water well. The addition of organic material for instance can greatly improve the water retention abilities of sandy soils and they can be added to adjust the pH of the soil to meet the needs of specific plants or to make highly acidic or ...