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  2. Enrichment factor - Wikipedia

    en.wikipedia.org/wiki/Enrichment_factor

    The enrichment factor can also be used to talk about the level of radioactive isotopes in uranium, or the level of minerals in soil. [1]The same concept is used in Bioinformatics for gene analysis, to measure the added value of a search tool over another one or over the homogeneous distribution in the genome population.

  3. Soil formation - Wikipedia

    en.wikipedia.org/wiki/Soil_formation

    Soil formation is influenced by at least five classic factors that are intertwined in the evolution of a soil. They are: parent material, climate, topography (relief), organisms, and time. [ 9 ] When reordered to climate, organisms, relief, parent material, and time, they form the acronym CLORPT.

  4. Supergene (geology) - Wikipedia

    en.wikipedia.org/wiki/Supergene_(geology)

    In ore deposit geology, supergene processes or enrichment are those that occur relatively near the surface as opposed to deep hypogene processes. Supergene processes include the predominance of meteoric water circulation (i.e. water derived from precipitation) with concomitant oxidation and chemical weathering.

  5. Biological soil crust - Wikipedia

    en.wikipedia.org/wiki/Biological_soil_crust

    Biocrust influences a soil's microtopography, carbohydrate content, porosity, and hydrophobicity which are the major contributing factors to soil hydrology. The relationship between biocrust and soil hydrology is not fully understood by scientists. It is known that the biocrust does play a role in the absorption and retention of moisture in the ...

  6. Hans Jenny (pedologist) - Wikipedia

    en.wikipedia.org/wiki/Hans_Jenny_(pedologist)

    In The Soil Resource, Origin and Behaviour (1980), Jenny redefined the soil forming factors as state variables and extended the effects to ecosystem properties. Parent material and relief define the initial state for soil development, regional climate, and potential biota, determine the rate at which chemical and biological transformations ...

  7. Soil - Wikipedia

    en.wikipedia.org/wiki/Soil

    How soil formation proceeds is influenced by at least five classic factors that are intertwined in the evolution of a soil: parent material, climate, topography (relief), organisms, and time. [56] When reordered to climate, relief, organisms, parent material, and time, they form the acronym CROPT.

  8. Universal Soil Loss Equation - Wikipedia

    en.wikipedia.org/wiki/Universal_Soil_Loss_Equation

    The Universal Soil Loss Equation (USLE) is a widely used mathematical model that describes soil erosion processes. [1]Erosion models play critical roles in soil and water resource conservation and nonpoint source pollution assessments, including: sediment load assessment and inventory, conservation planning and design for sediment control, and for the advancement of scientific understanding.

  9. Parent material - Wikipedia

    en.wikipedia.org/wiki/Parent_material

    Parent material is the underlying geological material (generally bedrock or a superficial or drift deposit) in which soil horizons form. Soils typically inherit a great deal of structure and minerals from their parent material, and, as such, are often classified based upon their contents of consolidated or unconsolidated mineral material that has undergone some degree of physical or chemical ...