Premium
Origin of red‐yellow mottling in a Ferric Acrisol of southern Spain
Author(s) -
Barrón V.,
Torrent J.
Publication year - 1987
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19871500508
Subject(s) - goethite , hematite , ferric , dissolution , ferric iron , ferrous , horizon , chemistry , mineralogy , inorganic chemistry , mathematics , geometry , organic chemistry , adsorption
We studied the spatial distribution of the amount and types of Fe oxides in a Ferric Acrisol having a red‐yellow mottled horizon. Red mottles contain hematite and goethite; yellow mottles have goethite but in amounts markedly smaller than those of the contiguous red mottles. We think that reductive dissolution caused the disappearance of the hematite and part of the goethite in the yellow mottles. This is supported by the experimental dissolution of the iron oxides of the clay fractions: hematite dissolved, on the average, at a rate twice of that of goethite.