CONTRIBUTION TO THE STUDY OF THE PROBLEM FOR EVALUATING THE QUALITY OF IRRIGATION WATER
In spite of unfavourable Ca+Mg: Na ratio and a relatively high percentage of Na, the degree of water mineralization should be taken into account, because waters with a low content of total salts are good for irrigation.
Also zero or only trace amounts of Na(in which case the SAR tends to O) should improve the evaluation, insofar as the EC25x106 is in the C2 or C3 class, since there is in fact no danger of salinization.
Though there are numerous evaluation methods it is not sufficient to rely on the criteria of only one of them. This is especially so when the quality determined by one method is on the borderline.