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  Encyclopedia of Keywords > Nature > Matter > Soil > Andisols   Michael Charnine

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  1. Andisols are dominated by short-range-order minerals or Al-humus complexes.
  2. Andisols are soils that have formed in volcanic ash or other volcanic ejecta.
  3. Andisols are soils developing in parent material containing at least fifty percent volcanic ash. (Web site)
  4. Andisols are dominated by short-range-order compounds (e.g. (Web site)
  5. Andisols are forming mostly in volcanic ejecta such as ash, pumice, cinders, and lava. (Web site)


  1. However, few such data exist in Japanese andisols.
  2. Potential hazard of heavy metals, especially of Cu and Zn, as a result of the use of swine compost on andisols, must be taken into account. (Web site)
  3. Hylander, L. D., Makino, T. & Ae, N. 2000. Extractable phosphorus as influenced by extraction time, pH, and fluoride concentration in Andisols.
  4. Vegetation: Andisols develop under a variety of vegetation types ranging from coniferous and deciduous forest, tundra, to shrubs. (Web site)

Soil Moisture Regimes

  1. Ustands: They are defined as Andisols with ustic soil moisture regimes. (Web site)
  2. Xerands: They are defined as Andisols with xeric soil moisture regimes. (Web site)
  3. Torrands: They are defined as Andisols with aridic soil moisture regimes. (Web site)


  1. The central concept of Andisols is that of soils dominated by short-range-order minerals.
  2. Many of the soils that were formerly thought to be Spodosols are now classified as Andisols, Alfisols, and Inceptisols. (Web site)
  3. This study is based on SWC and gas diffusion coefficient data measured on 22 soils from Japan, including 18 Andisols.
  4. The central concept of Andisols includes both vitric (relatively unweathered) and allophanic soils ( Parfitt and Clayden, 1991).
  5. The 149 soils sampled in the Palouse and Nez Perce Prairies were predominately Mollisols , with a few Alfisols , Inceptisols , Andisols , and Entisols .


  1. Mollic epipedons also occur in some Andisols but the andic properties take precedence.
  2. Andisols, or volcanic soils, have andic soil properties. (Web site)

Soil Temperature

  1. Cryands: They are defined as Andisols with cryic soil temperature regimes. (Web site)
  2. Udants: They are defined as Andisols with udic soil moisture regimes (most extensive Andisols). (Web site)
  3. Climate: Andisols form in all soil moisture and all soil temperature regimes, except pergelic. (Web site)


  1. The principal soil orders in western-montane forests are Inceptisols, Alfisols, Andisols, and Mollisols. (Web site)
  2. The two main orders found in the south of the country are Andisols and Ultisols. (Web site)
  3. Soils from a variety of soil orders may be found on volcanic terrains, but Andisols are almost exclusively confined to the pyroclastic materials. (Web site)

Subgroup Level

  1. Water retention characteristics are used to classify Andisols at the great group and subgroup level. (Web site)
  2. Soil moisture regime is used to distinguish Andisols at the great group and subgroup level: xeric (e.g. (Web site)

Volcanic Ash

  1. Key words: allophane, Andisols, Andosols, soil genesis, soil solution, volcanic ash 1.
  2. Andisols (volcanic ash soils) exhibit unusually high porosities and water retention properties.


  1. Olafur Arnalds, Agricultural University of Iceland 360b Effect of phospogypsum application on the chemical properties of Andisols.
  2. The pH of Andisols in Iceland under vegetative cover is usually one unit or more lower than in the soils with no vegetative cover ( Arnalds et al., 1995).


  1. It is generally the most productive of all the types in the region and is mostly on Andisols and Alfisols. (Web site)
  2. The cryic soils under the NW PIPO type are mostly the pumiceous Andisols of the central Oregon plateau (Carlson 1979; Meurisse 1985, 1987). (Web site)


  1. Data for 18 undisturbed Andisols and four undisturbed Gray-lowland soils.
  2. Both SWC-dependent gas diffusivity models predict the measured gas diffusivities in the undisturbed Andisols ( Fig.


  1. The remaining three Andisols (Tsumagoi 4 and 6, Kyushu 6) have b values between 10 and 15 and show similar behavior as the soils in Fig.
  2. Andisols, which show a layer 10 cm or more thick with characteristics of a mollic epipedon and more than 3 % organic carbon are named 'Thaptic' (e.g. (Web site)


  1. The %-base saturation is often low because of high percolation and leaching of cations in many Andisols. (Web site)
  2. Leaching of base cations is associated with the free drainage of many Andisols, i.e., percolating water leaches the cations out of the soil. (Web site)


  1. Udands - Andisols of humid climates. (Web site)
  2. Torrands - Andisols of very dry climates. (Web site)


  1. Both soils are Andisols and andosolization is the soil process leading to their formation (Shoji et al.
  2. Formation of Andisols in arid regions is limited because of slow weathering of volcanic parent materials. (Web site)

Volcanic Ejecta

  1. For example, Andisols is an order defined by the presence of specific minerals that indicate the soils' volcanic origin. (Web site)
  2. Andisols Andesite Soils formed from volcanic ejecta. (Web site)
  3. Parent Material: The vast majority of Andisols formed from pyroclastic deposits (volcanic ejecta) such as ash, pumice, cinders, and lava. (Web site)


  1. A characteristic of Andisols is their tendency to fix phosphate in a plant-unavailable form. (Web site)
  2. Soil properties for 18 Andisols and four Gray-lowland soils, including soil-water characteristic data at six soil matric potentials.


  1. Vitrands: They are Andisols that have a low water-holding capacity. (Web site)
  2. Andisols, and other soils with low bulk density, are often considered less susceptible to compaction than soils with higher bulk densities.


  1. Andisols occur around individual volcanoes created from andesite-rich magma. (Web site)
  2. The geographic distribution of Andisols is closely related to volcanoes that are active or have been active during the Holocene. (Web site)


  1. Epipedons are used to classify 'Melanic' and 'Histic' Andisols (e.g. (Web site)
  2. Vitrands - relatively young Andisols that are coarse-textured and dominated by glass. (Web site)
  3. Aquands: Aquands are Andisols that have a histic epipedon or have aquic conditions which result in redoximorphic features. (Web site)
  4. Time: Because volcanoclastic material is more weatherable than crystalline materials Andisols do not need very long time periods to form. (Web site)


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  Originally created: April 03, 2008.
  Links checked: June 13, 2013.
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