Articles | Volume 9, issue 1
https://doi.org/10.5194/soil-9-141-2023
https://doi.org/10.5194/soil-9-141-2023
Original research article
 | 
03 Mar 2023
Original research article |  | 03 Mar 2023

Wetting and drying cycles, organic amendments, and gypsum play a key role in structure formation and stability of sodic Vertisols

Sara Niaz, J. Bernhard Wehr, Ram C. Dalal, Peter M. Kopittke, and Neal W. Menzies

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Latest update: 19 Jul 2024
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Short summary
Sodic soils affect ~580 Mha in semi-arid and arid regions of the world. These soils have a weak structure. This laboratory study evaluated treatments to overcome the weak aggregate structure in two sodic Vertisols by applying organic amendments, gypsum, and wetting–drying cycles. We conclude that sodic soils need to be treated with gypsum to flocculate clay and organic amendments (lucerne or chicken manure) to form aggregates, whereas drying cycles aid in small macroaggregates formation.