Phytoremediation of Sodic and Saline-Sodic Soils

Qadir, M and Oster, J D and Schubert, S and Noble, A D and Sahrawat, K L (2007) Phytoremediation of Sodic and Saline-Sodic Soils. Advances in Agronomy, 96. pp. 197-247. ISSN 0065-2113

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Sodicity-induced soil degradation is a major environmental constraint with severe negative impacts on agricultural productivity and sustainability in arid and semiarid regions. As an important category of salt-affected soils, sodic soils are characterized by excess levels of sodium ions (Naþ) in the soil solution phase as well as on the cation exchange complex, exhibiting unique structural problems as a result of certain physical processes (slaking, swelling, and dispersion of clay) and specific conditions (surface crusting and hardsetting). Saline-sodic soils, another category of salt-affected soils, are generally grouped with sodic soils because of several common properties and management approaches. Sodic and saline-sodic soils occur within the boundaries of at least 75 countries, and their extent has increased steadily in several major irrigation schemes throughout the world. The use of these soils for crop production is on the increase as they are a valuable resource that cannot be neglected, especially in areas where significant investments have already been made in irrigation infrastructure. It is imperative to find ways to improve sodic and saline-sodic soils to ensure that they are able to support highly productive land-use systems to meet the challenges of global food security.

Item Type: Article
Subjects: Others > Soil Science
Depositing User: Users 6 not found.
Date Deposited: 17 Nov 2011 05:15
Last Modified: 07 Nov 2017 09:35
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Acknowledgement: We dedicate this contribution to Dr. Walter Pearson Kelley (1878–1965), University of California, Berkley for his pioneer research conducted in California that demonstrated phytoremediation to be an effective amelioration strategy for saline-sodic and sodic soils. This publication is a part of the joint initiative of the International Center for Agricultural Research in the Dry Areas (ICARDA) and the International Water Management Institute (IWMI) for the assessment and management of marginal-quality water resources and salt-affected soils.
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