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Table 3

Salinity index equations

Index and EquationDefinitionReference
 Sodium adsorption ratio Ayers & Westcot (1985)  
 Exchangeable sodium percentage Shainberg & Letey (1984)  
 Soluble sodium percentage Hwang et al. (2017)  
 Magnesium adsorption ratio 
 Kelly ratio 
 Residual sodium carbonate 
 Residual sodium bicarbonate 
 Permeability index 
 Potential salinity 
Index and EquationDefinitionReference
 Sodium adsorption ratio Ayers & Westcot (1985)  
 Exchangeable sodium percentage Shainberg & Letey (1984)  
 Soluble sodium percentage Hwang et al. (2017)  
 Magnesium adsorption ratio 
 Kelly ratio 
 Residual sodium carbonate 
 Residual sodium bicarbonate 
 Permeability index 
 Potential salinity 
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