It is well known that arid-land soils are adversely affected by the presence of sodium, yet only recently has the behavior of sodium in the soils of humid and subhumid areas --where most of the world's cereal crop is grown--been recognized. This book of commissioned chapters will focus on the"non-classic" sodic soils, describing the processes of soil degradation resulting from sodium and other deleterious components (such as magnesium), and outlining strategies for ameliorating their effects on soil systems.
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