Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The process of soil formation.
  • n. Reproduction of young during the larval or preadult stage, occurring chiefly in insects.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Process of the formation of soil.
  • n. Larval or preadult reproduction in some insects.

from The Century Dictionary and Cyclopedia

  • n. Larval generation; reproduction by larvæ; a kind of heterogamy which resembles alternate generation, and is regarded as a case of precocious development of the egg in parthenogenesis. It has been shown to occur in the larvæ of certain gall-flies, Cecidomyia, etc.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

pedo-1 + genesis.
pedo-2 + genesis.

from Wiktionary, Creative Commons Attribution/Share-Alike License

pedo- + -genesis

Examples

  • His main scientific interests are: forest pedology, influence of plants on pedogenesis, mineral weathering in soil, carbon sequestration in forest soils, effects of forest fires on soil properties.

    Contributor: Giacomo Certini

  • The processes of desert pedogenesis are distinctly expressed in the southern part of the ecoregion.

    Kazakh semi-desert

  • Late in the 19th century, scientists Hilgard in the United States and the Russian Dukuchaev both suggested independently that pedogenesis was principally controlled by climate and vegetation.

    Soil

  • Instead, pedogenesis is more influenced by factors like parent material, topography, vegetation, and time.

    Soil

  • The influence of parent material on pedogenesis is usually related to soil texture, soil chemistry, and nutrient cycling.

    Soil

  • Living organisms have a role in a number of processes involved in pedogenesis including organic matter accumulation, profile mixing, and biogeochemical nutrient cycling.

    Soil

  • Secondary minerals form through substantial chemical or structural changes of primary minerals or de novo precipitation from ion-rich solutions during pedogenesis.

    Soil forming factors

  • Additional natural factors that could contribute to a different degree to pedogenesis are spontaneous fires, earthquakes, tsunami, volcanism, and impacts of meteorites.

    Soil forming factors

  • In an increasingly populated planet, humans must be necessarily included among the state factors of pedogenesis because they take on increasing significance as an ecosystem variable.

    Soil forming factors

  • In 1941, the Swiss Hans Jenny (1899 – 1992) redefined the meaning of the factors of pedogenesis, assuming that the factors were independent variables and formulating the now famous equation:

    Soil forming factors

Comments

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  • Not the birth of feet--"soil evolution" or formation; the process by which soil is created. Also, a permanent larval stage with sexual development, as in certain gall midges.

    May 31, 2007