Dispersive Soils

“This is a comprehensive and well-written book that provides a good blend of the historical perspective of sodic and dispersive soils to new, more accurate indices and approaches to characterizing problematic dispersive soils.

This comprehensive book focuses on scientifically based processes and complexities affecting dispersive soils. While it acknowledges the importance of sodicity in characterizing dispersive soils and its historical approach, it includes other soil physical-chemical factors that can cause soils to disperse. Hence, this book describes the importance of moving away from traditional SAR and ESP indices to include other more comprehensive indices such as CROSSc, coupled with the electrical conductivity of the soil solution, which are more predictive of dispersive soil behavior. At the same time, the book provides detail into critical knowledge gaps in our understanding of the scientific mechanisms of dispersive soils and suggests opportunities for future research.”

Emeritus Professor S.R. Grattan, Department of Land, Air and Water Resources, University of California, Davis, USA

Dr. Pichu Rengasamy is internationally recognised for pioneering research that has advanced the understanding of soil sodicity and salinity. His frameworks have reshaped how soil stability is diagnosed and managed and continue to inform both theoretical soil science and practical land-rehabilitation strategies worldwide.

Dr. Ehsan Tavakkoli is an Associate Professor at the University of Adelaide. His research investigates how mineral reactivity, carbon cycling, and nutrient dynamics interact to control soil function and crop productivity, particularly under dispersive and salt-affected soils, and has advanced approaches for restoring degraded soils and strengthening the resilience of farming systems in Australia and beyond.

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