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  2. Bulk soil - Wikipedia

    en.wikipedia.org/wiki/Bulk_soil

    Bulk soil is soil outside the rhizosphere that is not penetrated by plant roots. The bulk soil is like an ecosystem, it is made up of many things such as: nutrients, ions, soil particles, and root exudates. There are many different interactions that occur between all the members of the bulk soil. Natural organic compounds are much lower in bulk ...

  3. Histosol - Wikipedia

    en.wikipedia.org/wiki/Histosol

    In both the World Reference Base for Soil Resources (WRB) [1] and the USDA soil taxonomy, [2] a Histosol is a soil consisting primarily of organic materials. They are defined as having 40 centimetres (16 in) or more of organic soil material starting within 40 cm from the soil surface. In Soil Taxonomy, Gelisols key out before Histosols, and in ...

  4. United Natural Foods - Wikipedia

    en.wikipedia.org/wiki/United_Natural_Foods

    United Natural Foods, Inc. (UNFI) is a Providence, Rhode Island –based natural and organic food company. The largest publicly traded wholesale distributor of health and specialty food in the United States and Canada, [3][4] it is Whole Foods Market 's main supplier, with their traffic making up over a third of its revenue in 2018. [5]

  5. Soil organic matter - Wikipedia

    en.wikipedia.org/wiki/Soil_organic_matter

    The water content of most vegetal detritus ranges from 60% to 90%. The dry matter consists mainly of carbon, oxygen, and hydrogen. Although these three elements make up about 92% of the dry weight of the organic matter in the soil, other elements present are essential for the nutrition of plants, including nitrogen, phosphorus, potassium, sulfur, calcium, magnesium, and many micronutrients.

  6. USDA soil taxonomy - Wikipedia

    en.wikipedia.org/wiki/USDA_soil_taxonomy

    A taxonomy is an arrangement in a systematic manner; the USDA soil taxonomy has six levels of classification. They are, from most general to specific: order, suborder, great group, subgroup, family and series. Soil properties that can be measured quantitatively are used in this classification system – they include: depth, moisture ...

  7. Organic farming - Wikipedia

    en.wikipedia.org/wiki/Organic_farming

    Organic farming, also known as organic agriculture or ecological farming or biological farming, [1][2][3][4][5] is an agricultural system that uses fertilizers of organic origin such as compost manure, green manure, and bone meal and places emphasis on techniques such as crop rotation and companion planting.

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