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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. John Innes compost - Wikipedia

    en.wikipedia.org/wiki/John_Innes_compost

    The potting mixes are used to grow different types of plants depending on their nutrient requirements. [1] All three potting mixes have the same soil component: 7 parts sterilised loam; 3 parts peat; 2 parts sharp sand [5] They each contain ground limestone, and varying quantities of the same base fertiliser mix: 2 parts hoof and horn; 2 parts ...

  4. Narragansett (soil) - Wikipedia

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

    The Narragansett soil series consists of coarse-loamy over sandy or sandy-skeletal, mixed, active, mesic Typic Dystrudepts. [1] [a] [3] They are well-drained, loamy soils that formed in friable glacial till mantled with a silty loess cap.

  5. How To Garden with Perlite Potting Soil - AOL

    www.aol.com/lifestyle/garden-perlite-potting...

    Soil mixes. Buy it pre-mixed into soils at a garden center, or make your own by mixing up to one-third part perlite with your soil. For succulents and orchids, you can use more.

  6. USDA soil taxonomy - Wikipedia

    en.wikipedia.org/wiki/USDA_soil_taxonomy

    About 1,000 soil subgroups are defined in the United States. [6] A soil family category is a group of soils within a subgroup and describes the physical and chemical properties which affect the response of soil to agricultural management and engineering applications. The principal characteristics used to differentiate soil families include ...

  7. Soil gradation - Wikipedia

    en.wikipedia.org/wiki/Soil_Gradation

    In soil science, soil gradation is a classification of a coarse-grained soil that ranks the soil based on the different particle sizes contained in the soil. [1] Soil gradation is an important aspect of soil mechanics and geotechnical engineering because it is an indicator of other engineering properties such as compressibility , shear strength ...