DOI: 10.1080/00103627609366672 Web URL(s): http://www.tandfonline.com/doi/pdf/10.1080/00103627609366672 Publication Type:
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Report Author(s): McLean, E. O. Author Affiliation: Ohio State University, Columbus and Ohio Agricultural Research and Development Center, Wooster, Ohio Title: Chemistry of soil aluminum Source: Communications in Soil Science and Plant Analysis . Vol. 7, No. 7, 1976, p. 619-636.# of Pages: 18 Publishing Information: New York, NY: Marcel Dekker Journals Related Web URL: http://www.tandfonline.com/doi/abs/10.1080/00103627609366672 Keywords: TIC Keywords: Soils ; Aluminum ; Acidity ; Lime ; Phosphorus ; Cation exchange capacity ; Exchangeable cations Abstract/Contents: "Better understanding of soil aluminum has had dramatic effects on the interpretation of many aspects of soil chemistry. Aluminum is a Group III element, metallic in nature, and exhibits both ionic and cuvaient bonding. It is the most plentiful of all metallic cations of the earth's crust. It is released from octahedral coordination with oxygen in minerals by weathering processes. Once released, the trivalent Al ion assumes octahedral coordination with six OH2 groups each of which dissociates a H ion in sequence as pH increases. The resulting hydroxy?Al ions are absorbed to the cation exchange capacity of the soil. Here they polymerize on charged surfaces and in the interlayers of the clay minerals obstructing both the contraction of the clay lattice and the exchange of cations. Soluble Al is toxic to most plants, and reacts readily with soluble phosphates converting them to relatively insoluble and plant?unavailable forms. Adsorbed and polymerized aluminum affects actual lime requirements of soils by its acidic nature and indicated lime requirements by its effect on the buffers of the lime requirement test. The level of exchangeable Al has been suggested as an Index of lime requirement of acid soils, but this may be an adequate Index for liming only on highly weathered soils." Language: English References: 17 Note: Chemical structures ASA/CSSA/SSSA Citation (Crop Science -Like - may be incomplete ): Commun. Soil. Sci. Plant Anal. 7(7):p. 619-636.Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=6817 If there are problems with this record, send us feedback about record 6817 . Choices for finding the above item : DOI: 10.1080/00103627609366672 Web URL(s): http://www.tandfonline.com/doi/pdf/10.1080/00103627609366672 S 590 .C54 Find from within TIC: Request through your local library's inter-library loan service (bring or send a copy of this TGIF record)
