Dynamics of organic matter in soils of temperate regions: Its action on pedogenesis
1976; Elsevier BV; Volume: 15; Issue: 1 Linguagem: Inglês
10.1016/0016-7061(76)90068-9
ISSN1872-6259
Autores Tópico(s)Food Industry and Aquatic Biology
ResumoThe author studies the reciprocal action of the organic and inorganic components during the process of humification in temperate climates. In an Atlantic climate, three main types of organo-mineral complexes occur: humus—CaCO3 in rendzina soils, humus-allophane in andosols and humus-iron in brown acid soils. These complexes differ in their properties, both biologically (ability to withstand biodegradation) and chemically (ability to withstand extractants). The humus-swelling clay complex, occurring in fluctuating pedoclimates, shows a high degree of polymerization of organic matter (maturation). The temperate humus forms are classified with regard to the kind and degree of transformation of the fresh organic matter: (1) little-transformed humus (e.g., calcic mull and moder); (2) strongly transformed humified humus (e.g., acid mull, andosol); (3) very much transformed, mature humus type (e.g., Vertisol, chernozem).
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