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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. Organic fertilizer - Wikipedia

    en.wikipedia.org/wiki/Organic_fertilizer

    Organic fertilizer. A cement reservoir containing cow manure mixed with water. This is common in rural Hainan Province, China. Note the bucket on a stick that the farmer uses to apply the mixture. Liming soil. Bone meal and meat meal can be added to soil to stimulate root growth and to release phosphorus. Organic fertilizers are fertilizers ...

  4. Soil - Wikipedia

    en.wikipedia.org/wiki/Soil

    Soil organic matter and soil minerals can adsorb the waste material and decrease its toxicity, [226] although when in colloidal form they may transport the adsorbed contaminants to subsurface environments. [227] Many waste treatment processes rely on this natural bioremediation capacity. Exceeding treatment capacity can damage soil biota and ...

  5. Ultisol - Wikipedia

    en.wikipedia.org/wiki/Ultisol

    Ultisol. Ultisol, commonly known as red clay soil, is one of twelve soil orders in the United States Department of Agriculture soil taxonomy. The word "Ultisol" is derived from "ultimate", because Ultisols were seen as the ultimate product of continuous weathering of minerals in a humid, temperate climate without new soil formation via glaciation.

  6. Compost - Wikipedia

    en.wikipedia.org/wiki/Compost

    Compost is a mixture of ingredients used as plant fertilizer and to improve soil 's physical, chemical, and biological properties. It is commonly prepared by decomposing plant and food waste, recycling organic materials, and manure. The resulting mixture is rich in plant nutrients and beneficial organisms, such as bacteria, protozoa, nematodes ...

  7. Andisol - Wikipedia

    en.wikipedia.org/wiki/Andisol

    ABwC. Parent material. tephra. In USDA soil taxonomy, andisols are soils formed in volcanic ash and defined as soils containing high proportions of glass and amorphous colloidal materials, including allophane, imogolite and ferrihydrite. [1] In the World Reference Base for Soil Resources (WRB), andisols are known as Andosols.

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