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Table 3

Classification of groundwater for irrigation purposes

Methods usedRangeClassification for irrigation purposesRange (in the study area)No. of sampling locations% of sampling locationsReference
SAR <10 Excellent 1.92–31.93 64.29 Richards (1954)  
10.0–18.0 Good 28.57 
18.0–26.0 Poor 0.00 
>26.0 Unsuitable 7.14 
%Na <20.0 Excellent 19.99–63.45 7.14 Wilcox (1948)  
20.0–40.0 Good 50.00 
40.0–60.0 Poor 35.71 
60.0–80.0 Very poor 7.14 
>80 Unsuitable 0.00 
RSC <1.25 Good –1.36–2.30 11 78.57 Eaton (1950)  
1.25–2.50 Poor 21.43 
>2.50 Unsuitable 0.00 
MHR <50.0 Suitable 28.29–41.10 13 92.86 Adimalla et al. (2018)  
>50.0 Unsuitable 7.14 
KR <1 Suitable 0.250–1.74 11 78.57 Kelley (1963)  
>1 Unsuitable 21.43 
EC (μS/cm) <250 Excellent 439.38–1,159.46 0.00 Wilcox (1948)  
250–750 Good 57.00 
750–2,250 Permissible 43.00 
>2,250 Unsuitable 0.00 
Methods usedRangeClassification for irrigation purposesRange (in the study area)No. of sampling locations% of sampling locationsReference
SAR <10 Excellent 1.92–31.93 64.29 Richards (1954)  
10.0–18.0 Good 28.57 
18.0–26.0 Poor 0.00 
>26.0 Unsuitable 7.14 
%Na <20.0 Excellent 19.99–63.45 7.14 Wilcox (1948)  
20.0–40.0 Good 50.00 
40.0–60.0 Poor 35.71 
60.0–80.0 Very poor 7.14 
>80 Unsuitable 0.00 
RSC <1.25 Good –1.36–2.30 11 78.57 Eaton (1950)  
1.25–2.50 Poor 21.43 
>2.50 Unsuitable 0.00 
MHR <50.0 Suitable 28.29–41.10 13 92.86 Adimalla et al. (2018)  
>50.0 Unsuitable 7.14 
KR <1 Suitable 0.250–1.74 11 78.57 Kelley (1963)  
>1 Unsuitable 21.43 
EC (μS/cm) <250 Excellent 439.38–1,159.46 0.00 Wilcox (1948)  
250–750 Good 57.00 
750–2,250 Permissible 43.00 
>2,250 Unsuitable 0.00 
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