Abstract
We studied the effects of both electrolyte concentration (C) and sodium adsorption ratio (SAR) on phosphorus retention by three arid-zone, surface soil samples differing in texture. The soil samples were previously equilibrated with NaCl-CaCl2 mixed salt solutions to render samples of different SAR values. The results indicate that phosphorus retention by the three soils increases as C increases or as SAR decreases. These effects should be considered when appraising phosphorus fertilizer application to salt-affected soils.
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