Sstandard. Sodium adsorption ratio, an important parameter for determining the suitability of groundwater for irrigation purposes is defined (Karanth, 1987) as: SAR = Na2 /{[(Ca2++Mg2+)/2]1/2} Where the concentrations are reported in meq/l.
Sstandard. Sodium adsorption ratio, an important parameter for determining the suitability of groundwater for irrigation purposes is defined (Karanth, 1987) as: SAR = Na2 /{[(Ca2++Mg2+)/2]1/2}Where the concentrations are reported in meq/l.