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  2. Sharp sand - Wikipedia

    en.wikipedia.org/wiki/Sharp_sand

    Sharp sand, also known as grit sand or river sand and as builders' sand, concrete sand, or ASTM C33 when medium or coarse grain, is a gritty sand used in concrete and potting soil mixes or to loosen clay soil [1] as well as for building projects. It is not cleaned or smoothed to the extent recreational play sand is. It is useful for drainage. [2]

  3. Sustainable drainage system - Wikipedia

    en.wikipedia.org/wiki/Sustainable_drainage_system

    Retention ponds such as this one in Dunfermline, Scotland, are considered components of a sustainable drainage system. Sustainable drainage systems (also known as SuDS, [1] SUDS, [2] [3] or sustainable urban drainage systems [4]) are a collection of water management practices that aim to align modern drainage systems with natural water processes and are part of a larger green infrastructure ...

  4. Sand equivalent test - Wikipedia

    en.wikipedia.org/wiki/Sand_equivalent_test

    The sand equivalent test quantifies the relative abundance of sand versus clay in soil. It is measured by standardized test methods such as ASTM D2419, AASHTO T176, and EN 933–8. [ 1 ] The test is used to qualify aggregates for applications where sand is desirable but fines and dust are not.

  5. Slow sand filter - Wikipedia

    en.wikipedia.org/wiki/Slow_sand_filter

    However, some slow sand filter operators use a method called "wet harrowing", where the sand is scraped while still under water, and the water used for cleaning is drained to waste. For municipal systems there usually is a certain degree of redundancy , since it is desirable for the maximum required throughput of water to be achievable with one ...

  6. Compost - Wikipedia

    en.wikipedia.org/wiki/Compost

    Although it is rarely used alone, plants can flourish from mixed soil that includes a mix of compost with other additives such as sand, grit, bark chips, vermiculite, perlite, or clay granules to produce loam. Compost can be tilled directly into the soil or growing medium to boost the level of organic matter and the overall fertility of the soil.

  7. Here's How to Keep Your Christmas Cactus Blooming Each Winter

    www.aol.com/christmas-cactus-bloom-within-six...

    After the gentle removal of your plant, massage the roots to remove old soil, then place it inside the new container so the "top of the root ball is about an inch (2.5 cm.) below the rim of the ...

  8. Greensand - Wikipedia

    en.wikipedia.org/wiki/Greensand

    Greensand or green sand is a sand or sandstone which has a greenish color. This term is specifically applied to shallow marine sediment that contains noticeable quantities of rounded greenish grains. These grains are called glauconies and consist of a mixture of mixed-layer clay minerals, such as smectite and glauconite. Greensand is also ...

  9. Sand filter - Wikipedia

    en.wikipedia.org/wiki/Sand_filter

    Larger sand grains can be used to overcome this problem, but if significant amounts of large solids are in the feed they need to be removed upstream of the sand bed filter by a process such as settling. [5]: 302–303 The depth of the sand bed is recommended to be around 0.6–1.8 m (2–6 ft) regardless of the application.

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