Definitions for mollisols
mol·lisols

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1. mollisols

   Mollisol is a soil type which has deep, high organic matter, nutrient-enriched surface soil (A horizon), typically between 60 and 80 cm in depth. This fertile surface horizon, called a mollic epipedon, is the defining diagnostic feature of Mollisols. Mollic epipedons are created by long-term addition of organic materials derived from plant roots and typically have soft, granular soil structure. Mollisols typically occur in savannahs and mountain valleys (such as Central Asia, and the North American Great Plains). These environments have historically been strongly influenced by fire and abundant pedoturbation from organisms such as ants and earthworms. It was estimated that in 2003, only 14 to 26 percent of grassland ecosystems still remained in a relatively natural state (that is, they were not used for agriculture due to the fertility of the horizon). Globally, they represent ~7% of ice-free land area. As the world's agriculturally most productive soil order, the Mollisols represent one of the most economically important soil orders. Though most other soil orders known today were formed at the beginning of the Carboniferous Ice Age 280 million years ago, Mollisols are best known from the paleopedological record as early as the Eocene. Their development is very closely associated with cooling and drying of the global climate that occurred during the Oligocene, Miocene and Pliocene.

WikidataRate this definition:2.0 / 1 vote

1. Mollisols

   Mollisols are a soil order in USDA soil taxonomy. Mollisols form in semi-arid to semi-humid areas, typically under a grassland cover. They are most commonly found in the mid-latitudes, namely in North America, mostly east of the Rocky Mountains, in South America in Argentina and Brazil, and in Asia in Mongolia and the Russian Steppes. Their parent material is typically base-rich and calcareous and include limestone, loess, or wind-blown sand. The main processes that lead to the formation of grassland Mollisols are melanisation, decomposition, humification and pedoturbation. Mollisols have deep, high organic matter, nutrient-enriched surface soil, typically between 60–80 cm in depth. This fertile surface horizon, known as a mollic epipedon, is the defining diagnostic feature of Mollisols. Mollic epipedons result from the long-term addition of organic materials derived from plant roots, and typically have soft, granular, soil structure. Mollisols occur in savannahs and mountain valleys. These environments have historically been strongly influenced by fire and abundant pedoturbation from organisms such as ants and earth worms. It was estimated that in 2003, only 14 to 26 percent of grassland ecosystems still remained in a relatively natural state. Globally, they represent ~7% of ice-free land area. As the world's most agriculturally productive soil order, the Mollisols represent one of the more economically important soil orders.

How to pronounce mollisols?

1. Alex

   US English

   David

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   Mark

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   Daniel

   British

   Libby

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   Mia

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   Karen

   Australian

   Hayley

   Australian

   Natasha

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   Indian

   Priya

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   Neerja

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   Zira

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   Oliver

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   Wendy

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   Fred

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   Tessa

   South African

How to say mollisols in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of mollisols in Chaldean Numerology is: 7

2. Pythagorean Numerology

   The numerical value of mollisols in Pythagorean Numerology is: 9

References

1. ^ Wikipedia
   https://en.wikipedia.org/wiki/Mollisols
2. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=mollisols