NDLI: Soils with Contrasted Pedoclimate

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Soils with Contrasted Pedoclimate

Content Provider	Scilit
Author	Duchaufour, Philippe
Copyright Year	2020
Description	As pointed out in Chapter 8, strong seasonal contrasts provoke alternation of saturation with water and complete desiccation of profiles, and exert considerable influence on pedogenesis, with threefold consequence: (1) neoformation of clay minerals is increased; (2) mineralization of the most labile organic fractions is accelerated but biological humification is prolonged by a process of maturation of the most stable fractions, which then turn black in colour; (3) the calcium cycle is also affected, partial or complete decarbonation of the humiferous horizqns being accompanied by precipitation of the entrained carbonates in the C (Cca horizon). These three processes are completed by deep homogenization (pedoturbation) of the A1 horizon, which sometimes takes the appearance of a structural (B) horizon (Vertisol). Of the two processes described in Chapter 8, melanization and vertisolization, the former is characteristic of cold continental climates (steppe) and the latter of subtropical and tropical climates. The organic matter content, compared to the content of swelling clay minerals, is sharply higher in melanized soils (Chernozems) than in Vertisols, causing the structural differences seen between soils of these two classes. Book Name: Handbook of Pedology
Related Links	https://content.taylorfrancis.com/books/download?dac=C2004-0-32236-8&isbn=9781003078050&doi=10.1201/9781003078050-16&format=pdf
Ending Page	187
Page Count	6
Starting Page	182
DOI	10.1201/9781003078050-16
Language	English
Publisher	Informa UK Limited
Publisher Date	2020-07-26
Access Restriction	Open
Subject Keyword	Book Name: Handbook of Pedology Clay Minerals Melanization Vertisolization
Content Type	Text
Resource Type	Chapter

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