Kelly ratio (KR)
Kelly ratio is an important index to assess the groundwater for irrigation purposes (Merouche et al., 2019). The value of KR less than one indicates the insufficiency of sodium ion (good for irrigation), and greater than one indicates an excessive amount of sodium ion in groundwater (unsuitable for irrigation). KR values in the groundwater varied from 0.05 to 0.69, with a mean of 0.21. All the sample locations are suitable for irrigation uses in the study area (Fig.11g).