Disaggregation and clay dispersion of oxisols : Na resin, a recommended methodology
1991
Comparison of five different dispersion techniques on six different low-activity clay-soil pedons showed that Na-resin treatment was the most efficient particle-size distribution method for the very stable Oxisols rich in gibbsite.
In these Oxisols, and particularly in their strongly aggregated A horizons, clay dispersion with combined controlled ultrasonic or vigorous mechanical and chemical treatments was lower and was partly pH-dependent.
The role of gibbsite, crystalline Fe oxides and oxyhydroxides, organic materials and poorly-ordered Al and Fe hydrous oxides on the aggregate stability of low-activity clay soil and clay dispersion is discussed.
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