[Identification of three categories of andic horizons in andosols]
(2000) Comptes rendus de l’Académie des sciences - Série IIA - - Science de la terre — Vol. 331, n° 10, p. 651-657 (2000)
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- At present, both the French Referential pedologique' and the WRB propose that a distinction be made between two categories of andic horizons i.e. the sil-andic and the aluandic horizons. We show that the alternative criteria (Si-o either > or < 6 g.kg(-1) and Al-p/Al-o either >0.5 or <0.5) selected presently to establish this distinction lead to ambiguous taxonomic placements. Vee present charts allowing estimation of the content of allophanes and Al-humus complexes in these horizons. The utilization of these charts points out that the andic horizons from the TUWAD database can be regrouped into three categories. Such a new regrouping takes much better into account the broad range of allophanes and Al-humus contents present in,Indic horizons. Accordingly, it should improve the schematic description of andosol profiles. (C) 2000 Academie des sciences / Editions scientifiques et medicales Elsevier SAS.
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Poulenard, J., & Herbillon, A. (2000). [Identification of three categories of andic horizons in andosols]. Comptes rendus de l’Académie des sciences - Série IIA - - Science de la terre, 331(10), 651-657. https://doi.org/10.1016/S1251-8050(00)01467-1 (Original work published 2000)