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The influence of organic matter, cation bridges and Fe‐ and Al‐oxides and hydroxides on the aggregation of three Alfisols
Author(s) -
Kostopoulou Sofia K.,
Panayiotopoulos Kyriakos P.
Publication year - 1993
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.19931560510
Subject(s) - ammonium oxalate , organic matter , chemistry , dithionite , specific surface area , particle size , oxalate , inorganic chemistry , cation exchange capacity , context (archaeology) , particle size distribution , fraction (chemistry) , chemical engineering , soil water , soil science , chromatography , organic chemistry , geology , engineering , paleontology , enzyme , catalysis
Abstract The effects of organic matter, cation bridges, and Fe‐ and Al‐oxides and hydroxides on binding soil particles were studied for three aggregate sizes of three different Alfisols. The binding effect was evaluated from changes in particle size distribution and from changes in surface area caused by selective removal of binding agents. Organic matter oxidation resulted in both clay fraction and surface area increase. The selective removal of cation bridges or dithionite‐extractable Fe‐ and Al‐oxides and hydroxides had no effect on particle size distribution but caused a considerable decrease in surface area. Ammonium oxalate treatment resulted in a decrease of both clay fraction and surface area of the aggregates. The findings of the present study are discussed in the context of formation of primary and secondary structural units as well as of the formation and stabilisation of microaggregates in soils.